fix: upgrade openai from 4.25.0 to 4.53.2

Snyk has created this PR to upgrade openai from 4.25.0 to 4.53.2. See this package in npm: openai See this project in Snyk: https://app.snyk.io/org/davehorton/project/6f41db32-9ff7-45b4-83ae-9512305f387b?utm_source=github&utm_medium=referral&page=upgrade-pr
2026-10-03 23:33:59 +00:00 · 2024-08-21 08:16:42 +00:00
8 changed files with 251 additions and 895 deletions
@@ -3,29 +3,8 @@ const {noopLogger, makeSynthKey} = require('./utils');
 const {JAMBONES_TTS_CACHE_DURATION_MINS} = require('./config');
 const EXPIRES = JAMBONES_TTS_CACHE_DURATION_MINS;

-function getExtensionAndSampleRate(path) {
-  const match = path.match(/\.([^.]*)$/);
-  if (!match) {
-    //default should be wav file.
-    return ['wav', 8000];
-  }
-
-  const extension = match[1];
-  const sampleRateMap = {
-    r8: 8000,
-    r16: 16000,
-    r24: 24000,
-    r44: 44100,
-    r48: 48000,
-    r96: 96000,
-  };
-
-  const sampleRate = sampleRateMap[extension] || 8000;
-  return [extension, sampleRate];
-}
-
 async function addFileToCache(client, logger, path,
-  {account_sid, vendor, language, voice, deploymentId, engine, model, text}) {
+  {account_sid, vendor, language, voice, deploymentId, engine, text}) {
  let key;
  logger = logger || noopLogger;

@@ -36,18 +15,10 @@ async function addFileToCache(client, logger, path,
      language: language || '',
      voice: voice || deploymentId,
      engine,
-      model,
      text,
    });
-    const [extension, sampleRate] = getExtensionAndSampleRate(path);
    const audioBuffer = await fs.readFile(path);
-    await client.setex(key, EXPIRES, JSON.stringify(
-      {
-        audioContent: audioBuffer.toString('base64'),
-        extension,
-        sampleRate
-      }
-    ));
+    await client.setex(key, EXPIRES, audioBuffer.toString('base64'));
  } catch (err) {
    logger.error(err, 'addFileToCache: Error');
    return;
@@ -7,23 +7,22 @@ const CACHE_EXPIRY = process.env.AWS_STS_SESSION_RESET_EXPIRY || (EXPIRY - 600);

 async function getAwsAuthToken(
  logger, createHash, retrieveHash,
-  {speech_credential_sid, accessKeyId, secretAccessKey, region, roleArn}) {
+  {accessKeyId, secretAccessKey, region, roleArn}) {
  logger = logger || noopLogger;
  try {
-    // if incase instance profile is used, speech_credential_sid will be used as key to lookup cache
-    const key = makeAwsKey(roleArn || accessKeyId || speech_credential_sid);
+    const key = makeAwsKey(roleArn || accessKeyId);
    const obj = await retrieveHash(key);
    if (obj) return {...obj, servedFromCache: true};
-    /* access token not found in cache, so generate it using STS */
+
    let data;
-    let expiry = CACHE_EXPIRY;
    if (roleArn) {
      const stsClient = new STSClient({ region });
      const roleToAssume = { RoleArn: roleArn, RoleSessionName: 'Jambonz_Speech', DurationSeconds: EXPIRY};
      const command = new AssumeRoleCommand(roleToAssume);

      data = await stsClient.send(command);
-    } else if (accessKeyId) {
+    } else {
+      /* access token not found in cache, so generate it using STS */
      const stsClient = new STSClient({
        region,
        credentials: {
@@ -33,26 +32,6 @@ async function getAwsAuthToken(
      });
      const command = new GetSessionTokenCommand({DurationSeconds: EXPIRY});
      data = await stsClient.send(command);
-    } else {
-      // instance profile is used.
-      const stsClient = new STSClient({ region });
-      const cred = await stsClient.config.credentials();
-      // method in the AWS SDK automatically fetches credentials using the default credential
-      // provider chain. If the credentials come from an instance profile or an environment
-      // variable, their expiration is controlled by AWS and not explicitly by our code.
-      if (cred && cred.expiration) {
-        const currentTime = new Date();
-        const expiryTime = new Date(cred.expiration);
-        const remainingTimeInSeconds = Math.round((expiryTime - currentTime) / 1000);
-        expiry = remainingTimeInSeconds;
-      }
-      data = {
-        Credentials: {
-          AccessKeyId: cred.accessKeyId,
-          SecretAccessKey: cred.secretAccessKey,
-          SessionToken: cred.sessionToken
-        }
-      };
    }

    const credentials = {
@@ -61,11 +40,9 @@ async function getAwsAuthToken(
      sessionToken: data.Credentials.SessionToken,
      securityToken: data.Credentials.SessionToken
    };
-    // Only cache if expiry is good
-    if (expiry > 0) {
-      createHash(key, credentials, expiry)
-        .catch((err) => logger.error(err, `Error saving hash for key ${key}`));
-    }
+
+    createHash(key, credentials, CACHE_EXPIRY)
+      .catch((err) => logger.error(err, `Error saving hash for key ${key}`));

    return {...credentials, servedFromCache: false};
  } catch (err) {
@@ -12,7 +12,7 @@ const debug = require('debug')('jambonz:realtimedb-helpers');
 * @returns {object} result - {error, purgedCount}
 */
 async function purgeTtsCache(client, logger, {all, account_sid, vendor,
-  language, voice, deploymentId, engine, model, text} = {all: true}) {
+  language, voice, deploymentId, engine, text} = {all: true}) {
  logger = logger || noopLogger;

  let purgedCount = 0, error;
@@ -33,7 +33,6 @@ async function purgeTtsCache(client, logger, {all, account_sid, vendor,
        language: language || '',
        voice: voice || deploymentId,
        engine,
-        model,
        text,
      });
      purgedCount = await client.del(key);
@@ -3,7 +3,6 @@ const fs = require('fs');
 const bent = require('bent');
 const ttsGoogle = require('@google-cloud/text-to-speech');
 const { PollyClient, SynthesizeSpeechCommand } = require('@aws-sdk/client-polly');
-const { CartesiaClient } = require('@cartesia/cartesia-js');

 const sdk = require('microsoft-cognitiveservices-speech-sdk');
 const TextToSpeechV1 = require('ibm-watson/text-to-speech/v1');
@@ -21,8 +20,7 @@ const {
  createKryptonClient,
  createRivaClient,
  noopLogger,
-  makeFilePath,
-  makePlayhtKey
+  makeFilePath
 } = require('./utils');
 const getNuanceAccessToken = require('./get-nuance-access-token');
 const getVerbioAccessToken = require('./get-verbio-token');
@@ -46,7 +44,7 @@ const {
  JAMBONES_HTTP_PROXY_IP,
  JAMBONES_HTTP_PROXY_PORT,
  JAMBONES_TTS_CACHE_DURATION_MINS,
-  JAMBONES_TTS_TRIM_SILENCE,
+  JAMBONES_EAGERLY_PRE_CACHE_AUDIO,
 } = require('./config');
 const EXPIRES = JAMBONES_TTS_CACHE_DURATION_MINS;
 const OpenAI = require('openai');
@@ -91,13 +89,13 @@ async function synthAudio(client, createHash, retrieveHash, logger, stats, { acc
  vendor, language, voice, gender, text, engine, salt, model, credentials, deploymentId,
  disableTtsCache, renderForCaching = false, disableTtsStreaming, options
 }) {
-  let audioData;
+  let audioBuffer;
  let servedFromCache = false;
  let rtt;
  logger = logger || noopLogger;

  assert.ok(['google', 'aws', 'polly', 'microsoft', 'wellsaid', 'nuance', 'nvidia', 'ibm', 'elevenlabs',
-    'whisper', 'deepgram', 'playht', 'rimelabs', 'verbio', 'cartesia'].includes(vendor) ||
+    'whisper', 'deepgram', 'playht', 'rimelabs', 'verbio'].includes(vendor) ||
  vendor.startsWith('custom'),
  `synthAudio supported vendors are google, aws, microsoft, nuance, nvidia and wellsaid ..etc, not ${vendor}`);
  if ('google' === vendor) {
@@ -158,9 +156,7 @@ async function synthAudio(client, createHash, retrieveHash, logger, stats, { acc
    if (!credentials.deepgram_tts_uri) {
      assert.ok(credentials.api_key, 'synthAudio requires api_key when deepgram is used');
    }
-  } else if ('cartesia' === vendor) {
-    assert.ok(credentials.api_key, 'synthAudio requires api_key when cartesia is used');
-    assert.ok(credentials.model_id, 'synthAudio requires model_id when cartesia is used');
+
  }

  const key = makeSynthKey({
@@ -169,26 +165,45 @@ async function synthAudio(client, createHash, retrieveHash, logger, stats, { acc
    language: language || '',
    voice: voice || deploymentId,
    engine,
-    // model or model_id is used to identify the tts cache.
-    model: model || credentials.model_id,
-    text
+    text,
+    renderForCaching
  });
-
+  let filePath;
+  filePath = makeFilePath({vendor, key, salt, renderForCaching});
  debug(`synth key is ${key}`);
  let cached;
  if (!disableTtsCache) {
    cached = await client.get(key);
+    /**
+    *  If we are using tts streaming and also precaching audio, audio could have been cached by streaming (r8)
+    * or here in speech-utils due to precaching (mp3), so we need to check for both keys.
+    */
+    if (!cached && JAMBONES_EAGERLY_PRE_CACHE_AUDIO) {
+      const preCachekey = makeSynthKey({
+        account_sid,
+        vendor,
+        language: language || '',
+        voice: voice || deploymentId,
+        engine,
+        text,
+        renderForCaching: true
+      });
+      cached = await client.get(preCachekey);
+      if (cached) {
+        // Precache audio is available update filpath with precache file extension.
+        filePath = makeFilePath({vendor, key, salt, renderForCaching: true});
+      }
+    }
  }
  if (cached) {
    // found in cache - extend the expiry and use it
    debug('result WAS found in cache');
    servedFromCache = true;
    stats.increment('tts.cache.requests', ['found:yes']);
-    audioData = JSON.parse(cached);
-    // convert base64 audio to buffer
-    audioData.audioContent = Buffer.from(audioData.audioContent, 'base64');
+    audioBuffer = Buffer.from(cached, 'base64');
    client.expire(key, EXPIRES).catch((err) => logger.info(err, 'Error setting expires'));
-  } else {
+  }
+  if (!cached) {
    // not found in cache - go get it from speech vendor and add to cache
    debug('result was NOT found in cache');
    stats.increment('tts.cache.requests', ['found:no']);
@@ -196,92 +211,82 @@ async function synthAudio(client, createHash, retrieveHash, logger, stats, { acc
    const startAt = process.hrtime();
    switch (vendor) {
      case 'google':
-        audioData = await synthGoogle(logger, {credentials, stats, language, voice, gender, text});
+        audioBuffer = await synthGoogle(logger, {credentials, stats, language, voice, gender, text});
        break;
      case 'aws':
      case 'polly':
        vendorLabel = 'aws';
-        audioData = await synthPolly(createHash, retrieveHash, logger,
+        audioBuffer = await synthPolly(createHash, retrieveHash, logger,
          {credentials, stats, language, voice, text, engine});
        break;
      case 'azure':
      case 'microsoft':
        vendorLabel = 'microsoft';
-        audioData = await synthMicrosoft(logger, {credentials, stats, language, voice, text, deploymentId,
-          renderForCaching, disableTtsStreaming});
+        audioBuffer = await synthMicrosoft(logger, {credentials, stats, language, voice, text, deploymentId,
+          filePath, renderForCaching, disableTtsStreaming});
        break;
      case 'nuance':
        model = model || 'enhanced';
-        audioData = await synthNuance(client, logger, {credentials, stats, voice, model, text});
+        audioBuffer = await synthNuance(client, logger, {credentials, stats, voice, model, text});
        break;
      case 'nvidia':
-        audioData = await synthNvidia(client, logger, {credentials, stats, language, voice, model, text});
+        audioBuffer = await synthNvidia(client, logger, {credentials, stats, language, voice, model, text});
        break;
      case 'ibm':
-        audioData = await synthIbm(logger, {credentials, stats, voice, text});
+        audioBuffer = await synthIbm(logger, {credentials, stats, voice, text});
        break;
      case 'wellsaid':
-        audioData = await synthWellSaid(logger, {credentials, stats, language, voice, text});
+        audioBuffer = await synthWellSaid(logger, {credentials, stats, language, voice, text, filePath});
        break;
      case 'elevenlabs':
-        audioData = await synthElevenlabs(logger, {
-          credentials, options, stats, language, voice, text, renderForCaching, disableTtsStreaming});
+        audioBuffer = await synthElevenlabs(logger, {
+          credentials, options, stats, language, voice, text, renderForCaching, disableTtsStreaming, filePath
+        });
        break;
      case 'playht':
-        audioData = await synthPlayHT(client, logger, {
-          credentials, options, stats, language, voice, text, renderForCaching, disableTtsStreaming});
-        break;
-      case 'cartesia':
-        audioData = await synthCartesia(logger, {
-          credentials, options, stats, language, voice, text, renderForCaching, disableTtsStreaming});
+        audioBuffer = await synthPlayHT(logger, {
+          credentials, options, stats, language, voice, text, renderForCaching, disableTtsStreaming, filePath
+        });
        break;
      case 'rimelabs':
-        audioData = await synthRimelabs(logger, {
-          credentials, options, stats, language, voice, text, renderForCaching, disableTtsStreaming});
+        audioBuffer = await synthRimelabs(logger, {
+          credentials, options, stats, language, voice, text, renderForCaching, disableTtsStreaming, filePath
+        });
        break;
      case 'whisper':
-        audioData = await synthWhisper(logger, {
+        audioBuffer = await synthWhisper(logger, {
          credentials, stats, voice, text, renderForCaching, disableTtsStreaming});
        break;
      case 'verbio':
-        audioData = await synthVerbio(client, logger, {
+        audioBuffer = await synthVerbio(client, logger, {
          credentials, stats, voice, text, renderForCaching, disableTtsStreaming});
-        if (audioData?.filePath) return audioData;
+        if (audioBuffer?.filePath) return audioBuffer;
        break;
      case 'deepgram':
-        audioData = await synthDeepgram(logger, {credentials, stats, model, text,
+        audioBuffer = await synthDeepgram(logger, {credentials, stats, model, text,
          renderForCaching, disableTtsStreaming});
        break;
      case vendor.startsWith('custom') ? vendor : 'cant_match_value':
-        audioData = await synthCustomVendor(logger,
-          {credentials, stats, language, voice, text});
+        ({ audioBuffer, filePath } = await synthCustomVendor(logger,
+          {credentials, stats, language, voice, text, filePath}));
        break;
      default:
        assert(`synthAudio: unsupported speech vendor ${vendor}`);
    }
-    if ('filePath' in audioData) return audioData;
+    if ('filePath' in audioBuffer) return audioBuffer;
    const diff = process.hrtime(startAt);
    const time = diff[0] * 1e3 + diff[1] * 1e-6;
    rtt = time.toFixed(0);
    stats.histogram('tts.response_time', rtt, [`vendor:${vendorLabel}`]);
    debug(`tts rtt time for ${text.length} chars on ${vendorLabel}: ${rtt}`);
    logger.info(`tts rtt time for ${text.length} chars on ${vendorLabel}: ${rtt}`);
-    // Save audio json to cache
-    client.setex(key, EXPIRES, JSON.stringify({
-      ...audioData,
-      audioContent: audioData.audioContent?.toString('base64')
-    }))
+
+    client.setex(key, EXPIRES, audioBuffer.toString('base64'))
      .catch((err) => logger.error(err, `error calling setex on key ${key}`));
  }

  return new Promise((resolve, reject) => {
-    const { audioContent, extension } = audioData;
-    const filePath = makeFilePath({
-      key,
-      salt,
-      extension
-    });
-    fs.writeFile(filePath, audioContent, (err) => {
+    fs.writeFile(filePath, audioBuffer, (err) => {
      if (err) return reject(err);
      resolve({filePath, servedFromCache, rtt});
    });
@@ -336,13 +341,7 @@ const synthPolly = async(createHash, retrieveHash, logger,
        .on('data', (chunk) => {
          chunks.push(chunk);
        })
-        .on('end', () => resolve(
-          {
-            audioContent: Buffer.concat(chunks),
-            extension: 'mp3',
-            sampleRate: 8000
-          }
-        ));
+        .on('end', () => resolve(Buffer.concat(chunks)));
    });
  } catch (err) {
    logger.info({err}, 'synthAudio: Error synthesizing speech using aws polly');
@@ -353,48 +352,6 @@ const synthPolly = async(createHash, retrieveHash, logger,

 const synthGoogle = async(logger, {credentials, stats, language, voice, gender, text}) => {
  const client = new ttsGoogle.TextToSpeechClient(credentials);
-  // If google custom voice cloning is used.
-  // At this time 31 Oct 2024, google node sdk has not support voice cloning yet.
-  if (typeof voice === 'object' && voice.voice_cloning_key) {
-    try {
-      const accessToken = await client.auth.getAccessToken();
-      const projectId = await client.getProjectId();
-
-      const post = bent('https://texttospeech.googleapis.com', 'POST', 'json', {
-        'Authorization': `Bearer ${accessToken}`,
-        'x-goog-user-project': projectId,
-        'Content-Type': 'application/json; charset=utf-8'
-      });
-
-      const payload = {
-        input: {
-          text
-        },
-        voice: {
-          language_code: language,
-          voice_clone: {
-            voice_cloning_key: voice.voice_cloning_key
-          }
-        },
-        audioConfig: {
-          // Cloning voice at this time still in v1 beta version, and it support LINEAR16 in Wav format, 24.000Hz
-          audioEncoding: 'LINEAR16',
-          sample_rate_hertz: 24000
-        }
-      };
-
-      const wav = await post('/v1beta1/text:synthesize', payload);
-      return {
-        audioContent: Buffer.from(wav.audioContent, 'base64'),
-        extension: 'wav',
-        sampleRate: 24000
-      };
-    } catch (err) {
-      logger.info({err: await err.text()}, 'synthGoogle returned error');
-      throw err;
-    }
-  }
-
  const opts = {
    voice: {
      ...(typeof voice === 'string' && {name: voice}),
@@ -409,11 +366,7 @@ const synthGoogle = async(logger, {credentials, stats, language, voice, gender,
    const responses = await client.synthesizeSpeech(opts);
    stats.increment('tts.count', ['vendor:google', 'accepted:yes']);
    client.close();
-    return {
-      audioContent: responses[0].audioContent,
-      extension: 'mp3',
-      sampleRate: 8000
-    };
+    return responses[0].audioContent;
  } catch (err) {
    console.error(err);
    logger.info({err, opts}, 'synthAudio: Error synthesizing speech using google');
@@ -444,11 +397,7 @@ const synthIbm = async(logger, {credentials, stats, voice, text}) => {
    for await (const chunk of r.result) {
      chunks.push(chunk);
    }
-    return {
-      audioContent: Buffer.concat(chunks),
-      extension: 'mp3',
-      sampleRate: 8000
-    };
+    return Buffer.concat(chunks);
  } catch (err) {
    logger.info({err, params}, 'synthAudio: Error synthesizing speech using ibm');
    stats.increment('tts.count', ['vendor:ibm', 'accepted:no']);
@@ -458,9 +407,11 @@ const synthIbm = async(logger, {credentials, stats, voice, text}) => {

 async function _synthOnPremMicrosoft(logger, {
  credentials,
+  stats,
  language,
  voice,
-  text
+  text,
+  filePath
 }) {
  const {use_custom_tts, custom_tts_endpoint_url, api_key} = credentials;
  let content = text;
@@ -482,19 +433,15 @@ async function _synthOnPremMicrosoft(logger, {
  }

  try {
-    const trimSilence = JAMBONES_TTS_TRIM_SILENCE;
+    const trimSilence = filePath.endsWith('.r8');
    const post = bent('POST', 'buffer', {
      'X-Microsoft-OutputFormat': trimSilence ? 'raw-8khz-16bit-mono-pcm' : 'audio-16khz-32kbitrate-mono-mp3',
      'Content-Type': 'application/ssml+xml',
      'User-Agent': 'Jambonz',
      ...(api_key && {'Ocp-Apim-Subscription-Key': api_key})
    });
-    const audioContent = await post(custom_tts_endpoint_url, content);
-    return {
-      audioContent,
-      extension: trimSilence ? 'r8' : 'mp3',
-      sampleRate: 8000
-    };
+    const mp3 = await post(custom_tts_endpoint_url, content);
+    return mp3;
  } catch (err) {
    logger.info({err}, '_synthMicrosoftByHttp returned error');
    throw err;
@@ -507,6 +454,7 @@ const synthMicrosoft = async(logger, {
  language,
  voice,
  text,
+  filePath,
  renderForCaching,
  disableTtsStreaming
 }) => {
@@ -549,18 +497,17 @@ const synthMicrosoft = async(logger, {
        rtt: 0
      };
    }
-    // Azure Onprem
    if (use_custom_tts && custom_tts_endpoint_url) {
      return await _synthOnPremMicrosoft(logger, {
        credentials,
        stats,
        language,
        voice,
-        text
+        text,
+        filePath
      });
    }
-    // Azure hosted service
-    const trimSilence = JAMBONES_TTS_TRIM_SILENCE;
+    const trimSilence = filePath.endsWith('.r8');
    const speechConfig = SpeechConfig.fromSubscription(apiKey, region);
    speechConfig.speechSynthesisLanguage = language;
    speechConfig.speechSynthesisVoiceName = voice;
@@ -595,11 +542,7 @@ const synthMicrosoft = async(logger, {
            case ResultReason.SynthesizingAudioCompleted:
              let buffer = Buffer.from(result.audioData);
              if (trimSilence) buffer = trimTrailingSilence(buffer);
-              resolve({
-                audioContent: buffer,
-                extension: trimSilence ? 'r8' : 'mp3',
-                sampleRate: 8000
-              });
+              resolve(buffer);
              synthesizer.close();
              stats.increment('tts.count', ['vendor:microsoft', 'accepted:yes']);
              break;
@@ -629,15 +572,11 @@ const synthWellSaid = async(logger, {credentials, stats, language, voice, gender
      'Accept': 'audio/mpeg',
      'Content-Type': 'application/json'
    });
-    const audioContent = await post('/v1/tts/stream', {
+    const mp3 = await post('/v1/tts/stream', {
      text,
      speaker_id: voice
    });
-    return {
-      audioContent,
-      extension: 'mp3',
-      sampleRate: 8000
-    };
+    return mp3;
  } catch (err) {
    logger.info({err}, 'testWellSaidTts returned error');
    throw err;
@@ -674,8 +613,8 @@ const synthNuance = async(client, logger, {credentials, stats, voice, model, tex
    t.setText(text);
    input.setText(t);
  }
-  const sampleRate = 8000;
-  pcm.setSampleRateHz(sampleRate);
+
+  pcm.setSampleRateHz(8000);
  f.setPcm(pcm);
  p.setAudioFormat(f);
  v.setName(voice);
@@ -699,11 +638,7 @@ const synthNuance = async(client, logger, {credentials, stats, voice, model, tex
        const details = status.getDetails();
        return reject({code, message, details});
      }
-      resolve({
-        audioContent: Buffer.from(response.getAudio()),
-        extension: 'r8',
-        sampleRate
-      });
+      resolve(Buffer.from(response.getAudio()));
    });
  });
 };
@@ -711,13 +646,12 @@ const synthNuance = async(client, logger, {credentials, stats, voice, model, tex
 const synthNvidia = async(client, logger, {credentials, stats, language,  voice, model, text}) => {
  const {riva_server_uri} = credentials;
  let rivaClient, request;
-  const sampleRate = 8000;
  try {
    rivaClient = await createRivaClient(riva_server_uri);
    request = new SynthesizeSpeechRequest();
    request.setVoiceName(voice);
    request.setLanguageCode(language);
-    request.setSampleRateHz(sampleRate);
+    request.setSampleRateHz(8000);
    request.setEncoding(AudioEncoding.LINEAR_PCM);
    request.setText(text);
  } catch (err) {
@@ -731,11 +665,7 @@ const synthNvidia = async(client, logger, {credentials, stats, language,  voice,
        logger.info({err, voice, language}, 'error synthesizing speech using Nvidia');
        return reject(err);
      }
-      resolve({
-        audioContent: Buffer.from(response.getAudio()),
-        extension: 'r8',
-        sampleRate
-      });
+      resolve(Buffer.from(response.getAudio()));
    });
  });
 };
@@ -757,13 +687,12 @@ const synthCustomVendor = async(logger, {credentials, stats, language, voice, te
      text
    });

+    const regex = /\.[^\.]*$/g;
    const mime = response.headers['content-type'];
    const buffer = await response.arrayBuffer();
-    const [extension, sampleRate] = getFileExtFromMime(mime);
    return {
-      audioContent: buffer,
-      extension,
-      sampleRate
+      audioBuffer: buffer,
+      filePath: filePath.replace(regex, getFileExtFromMime(mime))
    };
  } catch (err) {
    logger.info({err}, `Vendor ${vendor} returned error`);
@@ -809,7 +738,7 @@ const synthElevenlabs = async(logger, {
      'Accept': 'audio/mpeg',
      'Content-Type': 'application/json'
    });
-    const audioContent = await post(`/v1/text-to-speech/${voice}${optimize_streaming_latency}`, {
+    const mp3 = await post(`/v1/text-to-speech/${voice}${optimize_streaming_latency}`, {
      text,
      model_id,
      voice_settings: {
@@ -818,11 +747,7 @@ const synthElevenlabs = async(logger, {
      },
      ...opts
    });
-    return {
-      audioContent,
-      extension: 'mp3',
-      sampleRate: 8000
-    };
+    return mp3;
  } catch (err) {
    logger.info({err}, 'synth Elevenlabs returned error');
    stats.increment('tts.count', ['vendor:elevenlabs', 'accepted:no']);
@@ -830,40 +755,12 @@ const synthElevenlabs = async(logger, {
  }
 };

-const synthPlayHT = async(client, logger, {
-  credentials, options, stats, voice, language, text, renderForCaching, disableTtsStreaming
+const synthPlayHT = async(logger, {
+  credentials, options, stats, voice, text, renderForCaching, disableTtsStreaming
 }) => {
  const {api_key, user_id, voice_engine, options: credOpts} = credentials;
  const opts = !!options && Object.keys(options).length !== 0 ? options : JSON.parse(credOpts || '{}');

-  let synthesizeUrl = 'https://api.play.ht/api/v2/tts/stream';
-
-  // If model is play3.0, the synthesizeUrl is got from authentication endpoint
-  if (voice_engine === 'Play3.0') {
-    try {
-      const post = bent('https://api.play.ht', 'POST', 'json', 201, {
-        'AUTHORIZATION': api_key,
-        'X-USER-ID': user_id,
-        'Accept': 'application/json'
-      });
-      const key = makePlayhtKey(api_key);
-      const url = await client.get(key);
-      if (!url) {
-        const {inference_address, expires_at_ms} = await post('/api/v3/auth');
-        synthesizeUrl = inference_address;
-        const expiry =  Math.floor((expires_at_ms - Date.now()) / 1000 - 30);
-        await client.set(key, inference_address, 'EX', expiry);
-      } else {
-        // Use cached URL
-        synthesizeUrl = url;
-      }
-    } catch (err) {
-      logger.info({err}, 'synth PlayHT returned error for authentication version 3.0');
-      stats.increment('tts.count', ['vendor:playht', 'accepted:no']);
-      throw err;
-    }
-  }
-
  /* default to using the streaming interface, unless disabled by env var OR we want just a cache file */
  if (!JAMBONES_DISABLE_TTS_STREAMING && !renderForCaching && !disableTtsStreaming) {
    let params = '';
@@ -872,9 +769,7 @@ const synthPlayHT = async(client, logger, {
    params += ',vendor=playht';
    params += `,voice=${voice}`;
    params += `,voice_engine=${voice_engine}`;
-    params += `,synthesize_url=${synthesizeUrl}`;
    params += ',write_cache_file=1';
-    params += `,language=${language}`;
    if (opts.quality) params += `,quality=${opts.quality}`;
    if (opts.speed) params += `,speed=${opts.speed}`;
    if (opts.seed) params += `,style=${opts.seed}`;
@@ -883,8 +778,6 @@ const synthPlayHT = async(client, logger, {
    if (opts.voice_guidance) params += `,voice_guidance=${opts.voice_guidance}`;
    if (opts.style_guidance) params += `,style_guidance=${opts.style_guidance}`;
    if (opts.text_guidance) params += `,text_guidance=${opts.text_guidance}`;
-    if (opts.top_p) params += `,top_p=${opts.top_p}`;
-    if (opts.repetition_penalty) params += `,repetition_penalty=${opts.repetition_penalty}`;
    params += '}';

    return {
@@ -895,29 +788,21 @@ const synthPlayHT = async(client, logger, {
  }

  try {
-    const post = bent('POST', 'buffer', {
-      ...(voice_engine !== 'Play3.0' && {
-        'AUTHORIZATION': api_key,
-        'X-USER-ID': user_id,
-      }),
+    const post = bent('https://api.play.ht', 'POST', 'buffer', {
+      'AUTHORIZATION': api_key,
+      'X-USER-ID': user_id,
      'Accept': 'audio/mpeg',
      'Content-Type': 'application/json'
    });
-
-    const audioContent = await post(synthesizeUrl, {
+    const mp3 = await post('/api/v2/tts/stream', {
      text,
-      ...(voice_engine === 'Play3.0' && { language }),
      voice,
      voice_engine,
      output_format: 'mp3',
      sample_rate: 8000,
      ...opts
    });
-    return {
-      audioContent,
-      extension: 'mp3',
-      sampleRate: 8000
-    };
+    return mp3;
  } catch (err) {
    logger.info({err}, 'synth PlayHT returned error');
    stats.increment('tts.count', ['vendor:playht', 'accepted:no']);
@@ -926,7 +811,7 @@ const synthPlayHT = async(client, logger, {
 };

 const synthRimelabs = async(logger, {
-  credentials, options, stats, language, voice, text, renderForCaching, disableTtsStreaming
+  credentials, options, stats, voice, text, renderForCaching, disableTtsStreaming
 }) => {
  const {api_key, model_id, options: credOpts} = credentials;
  const opts = !!options && Object.keys(options).length !== 0 ? options : JSON.parse(credOpts || '{}');
@@ -937,7 +822,6 @@ const synthRimelabs = async(logger, {
    params += `{api_key=${api_key}`;
    params += `,model_id=${model_id}`;
    params += ',vendor=rimelabs';
-    params += `,language=${language}`;
    params += `,voice=${voice}`;
    params += ',write_cache_file=1';
    if (opts.speedAlpha) params += `,speed_alpha=${opts.speedAlpha}`;
@@ -957,20 +841,14 @@ const synthRimelabs = async(logger, {
      'Accept': 'audio/mp3',
      'Content-Type': 'application/json'
    });
-    const sampleRate = 8000;
-    const audioContent = await post('/v1/rime-tts', {
+    const mp3 = await post('/v1/rime-tts', {
      speaker: voice,
      text,
      modelId: model_id,
-      samplingRate: sampleRate,
-      lang: language,
+      samplingRate: 8000,
      ...opts
    });
-    return {
-      audioContent,
-      extension: 'mp3',
-      sampleRate
-    };
+    return mp3;
  } catch (err) {
    logger.info({err}, 'synth rimelabs returned error');
    stats.increment('tts.count', ['vendor:rimelabs', 'accepted:no']);
@@ -1004,17 +882,13 @@ const synthVerbio = async(client, logger, {credentials, stats, voice, text, rend
      'User-Agent': 'jambonz',
      'Content-Type': 'application/json'
    });
-    const audioContent = await post('/api/v1/synthesize', {
+    const r8 = await post('/api/v1/synthesize', {
      voice_id: voice,
      output_sample_rate: '8k',
      output_encoding: 'pcm16',
      text
    });
-    return {
-      audioContent,
-      extension: 'r8',
-      sampleRate: 8000
-    };
+    return r8;
  } catch (err) {
    logger.info({err}, 'synth Verbio returned error');
    stats.increment('tts.count', ['vendor:verbio', 'accepted:no']);
@@ -1054,11 +928,7 @@ const synthWhisper = async(logger, {credentials, stats, voice, text, renderForCa
      input: text,
      response_format: 'mp3'
    });
-    return {
-      audioContent: Buffer.from(await mp3.arrayBuffer()),
-      extension: 'mp3',
-      sampleRate: 8000
-    };
+    return Buffer.from(await mp3.arrayBuffer());
  } catch (err) {
    logger.info({err}, 'synth whisper returned error');
    stats.increment('tts.count', ['vendor:openai', 'accepted:no']);
@@ -1090,14 +960,10 @@ const synthDeepgram = async(logger, {credentials, stats, model, text, renderForC
      'Accept': 'audio/mpeg',
      'Content-Type': 'application/json'
    });
-    const audioContent = await post(`/v1/speak?model=${model}`, {
+    const mp3 = await post(`/v1/speak?model=${model}`, {
      text
    });
-    return {
-      audioContent,
-      extension: 'mp3',
-      sampleRate: 8000
-    };
+    return mp3;
  } catch (err) {
    logger.info({err}, 'synth Deepgram returned error');
    stats.increment('tts.count', ['vendor:deepgram', 'accepted:no']);
@@ -1105,96 +971,26 @@ const synthDeepgram = async(logger, {credentials, stats, model, text, renderForC
  }
 };

-const synthCartesia = async(logger, {
-  credentials, options, stats, voice, language, text, renderForCaching, disableTtsStreaming
-}) => {
-  const {api_key, model_id, embedding, options: credOpts} = credentials;
-  const opts = !!options && Object.keys(options).length !== 0 ? options : JSON.parse(credOpts || '{}');
-
-  if (!JAMBONES_DISABLE_TTS_STREAMING && !renderForCaching && !disableTtsStreaming) {
-    let params = '';
-    params += `{api_key=${api_key}`;
-    params += `,model_id=${model_id}`;
-    params += ',vendor=cartesia';
-    params += `,voice=${voice}`;
-    params += ',write_cache_file=1';
-    params += `,language=${language}`;
-    params += `,voice_mode=${embedding ? 'embedding' : 'id'}`;
-    if (embedding) params += `,embedding=${embedding}`;
-    if (opts.speed) params += `,speed=${opts.speed}`;
-    if (opts.emotion) params += `,emotion=${opts.emotion}`;
-    params += '}';
-
-    return {
-      filePath: `say:${params}${text.replace(/\n/g, ' ').replace(/\r/g, ' ')}`,
-      servedFromCache: false,
-      rtt: 0
-    };
-  }
-
-  try {
-    const client = new CartesiaClient({ apiKey: api_key });
-    const sampleRate = 48000;
-    const mp3 = await client.tts.bytes({
-      modelId: model_id,
-      transcript: text,
-      voice: {
-        mode: embedding ? 'embedding' : 'id',
-        ...(embedding ?
-          {
-            embedding: embedding.split(',').map(Number)
-          } :
-          {
-            id: voice
-          }
-        ),
-        ...(opts.speed || opts.emotion && {
-          experimentalControls: {
-            ...(opts.speed !== null && opts.speed !== undefined && {speed: opts.speed}),
-            ...(opts.emotion && {emotion: opts.emotion}),
-          }
-        })
-      },
-      language: language,
-      outputFormat: {
-        container: 'mp3',
-        bitRate: 128000,
-        sampleRate
-      },
-    });
-    return {
-      audioContent: Buffer.from(mp3),
-      extension: 'mp3',
-      sampleRate
-    };
-  } catch (err) {
-    logger.info({err}, 'synth Cartesia returned error');
-    stats.increment('tts.count', ['vendor:cartesia', 'accepted:no']);
-    throw err;
-  }
-
-};
-
 const getFileExtFromMime = (mime) => {
  switch (mime) {
    case 'audio/wav':
    case 'audio/x-wav':
-      return ['wav', 8000];
+      return '.wav';
    case /audio\/l16.*rate=8000/.test(mime) ? mime : 'cant match value':
-      return ['r8', 8000];
+      return '.r8';
    case /audio\/l16.*rate=16000/.test(mime) ? mime : 'cant match value':
-      return ['r16', 16000];
+      return '.r16';
    case /audio\/l16.*rate=24000/.test(mime) ? mime : 'cant match value':
-      return ['r24', 24000];
+      return '.r24';
    case /audio\/l16.*rate=32000/.test(mime) ? mime : 'cant match value':
-      return ['r32', 32000];
+      return '.r32';
    case /audio\/l16.*rate=48000/.test(mime) ? mime : 'cant match value':
-      return ['r48', 48000];
+      return '.r48';
    case 'audio/mpeg':
    case 'audio/mp3':
-      return ['mp3', 8000];
+      return '.mp3';
    default:
-      return ['wav', 8000];
+      return '.wav';
  }
 };

@@ -6,7 +6,7 @@ const pool = new Pool('https://auth.crt.nuance.com');
 const NUANCE_AUTH_ENDPOINT = 'tts.api.nuance.com:443';
 const grpc = require('@grpc/grpc-js');
 const formurlencoded = require('form-urlencoded');
-const { TMP_FOLDER, HTTP_TIMEOUT } = require('./config');
+const { JAMBONES_DISABLE_TTS_STREAMING, JAMBONES_TTS_TRIM_SILENCE, TMP_FOLDER, HTTP_TIMEOUT } = require('./config');

 const debug = require('debug')('jambonz:realtimedb-helpers');
 /**
@@ -17,26 +17,50 @@ const debug = require('debug')('jambonz:realtimedb-helpers');
 //const nuanceClientMap = new Map();

 function makeSynthKey({
-  account_sid = '',
-  vendor,
-  language,
-  voice,
-  engine = '',
-  model = '',
-  text
-}) {
+  account_sid = '', vendor, language, voice, engine = '', text,
+  renderForCaching = false}) {
  const hash = crypto.createHash('sha1');
-  hash.update(`${language}:${vendor}:${voice}:${engine}:${model}:${text}`);
+  hash.update(`${language}:${vendor}:${voice}:${engine}:${text}`);
  const hexHashKey = hash.digest('hex');
  const accountKey = account_sid ? `:${account_sid}` : '';
-  const key = `tts${accountKey}:${hexHashKey}`;
+  const namespace = vendor.startsWith('custom') ? vendor : getFileExtension({vendor, renderForCaching});
+  const key = `tts${accountKey}:${namespace}:${hexHashKey}`;
  return key;
 }

-function makeFilePath({key, salt = '', extension}) {
+function makeFilePath({vendor, key, salt = '', renderForCaching = false}) {
+  const extension = getFileExtension({vendor, renderForCaching});
  return `${TMP_FOLDER}/${key.replace('tts:', `tts-${salt}`)}.${extension}`;
 }

+function getFileExtension({vendor, renderForCaching = false}) {
+  const mp3Extension = 'mp3';
+  const r8Extension = 'r8';
+
+  switch (vendor) {
+    case 'azure':
+    case 'microsoft':
+      if (!renderForCaching && !JAMBONES_DISABLE_TTS_STREAMING || JAMBONES_TTS_TRIM_SILENCE) {
+        return r8Extension;
+      } else {
+        return mp3Extension;
+      }
+    case 'deepgram':
+    case 'elevenlabs':
+    case 'rimlabs':
+      if (!renderForCaching && !JAMBONES_DISABLE_TTS_STREAMING) {
+        return r8Extension;
+      } else {
+        return mp3Extension;
+      }
+    case 'nuance':
+    case 'nvidia':
+    case 'verbio':
+      return r8Extension;
+    default:
+      return mp3Extension;
+  }
+}

 const noopLogger = {
  info: () => {},
@@ -65,11 +89,6 @@ function makeAwsKey(awsAccessKeyId) {
  return `aws:${hash.digest('hex')}`;
 }

-function makePlayhtKey(apiKey) {
-  const hash = crypto.createHash('sha1');
-  hash.update(apiKey);
-  return `playht:${hash.digest('hex')}`;
-}
 function makeVerbioKey(client_id) {
  const hash = crypto.createHash('sha1');
  hash.update(client_id);
@@ -143,7 +162,6 @@ module.exports = {
  makeSynthKey,
  makeNuanceKey,
  makeIbmKey,
-  makePlayhtKey,
  makeAwsKey,
  makeVerbioKey,
  getNuanceAccessToken,
@@ -1,18 +1,17 @@
 {
  "name": "@jambonz/speech-utils",
-  "version": "0.2.3",
+  "version": "0.1.15",
  "lockfileVersion": 2,
  "requires": true,
  "packages": {
    "": {
      "name": "@jambonz/speech-utils",
-      "version": "0.2.3",
+      "version": "0.1.15",
      "license": "MIT",
      "dependencies": {
        "@aws-sdk/client-polly": "^3.496.0",
        "@aws-sdk/client-sts": "^3.496.0",
-        "@cartesia/cartesia-js": "^2.1.0",
-        "@google-cloud/text-to-speech": "^5.5.0",
+        "@google-cloud/text-to-speech": "^5.0.2",
        "@grpc/grpc-js": "^1.9.14",
        "@jambonz/realtimedb-helpers": "^0.8.7",
        "bent": "^7.3.12",
@@ -21,7 +20,7 @@
        "google-protobuf": "^3.21.2",
        "ibm-watson": "^8.0.0",
        "microsoft-cognitiveservices-speech-sdk": "1.38.0",
-        "openai": "^4.25.0",
+        "openai": "^4.53.2",
        "undici": "^6.4.0"
      },
      "devDependencies": {
@@ -1174,92 +1173,6 @@
        "node": ">=6.9.0"
      }
    },
-    "node_modules/@cartesia/cartesia-js": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/@cartesia/cartesia-js/-/cartesia-js-2.1.0.tgz",
-      "integrity": "sha512-r4uqhFWxVmFbm0A6aDeY0y3RVJHAc6PQ8hTwHmb2ZO2kmyAP4WoZdEEQ9GIU/5c1XpV5n3Y/y6zKjMzUwgG64A==",
-      "dependencies": {
-        "emittery": "^0.13.1",
-        "form-data": "^4.0.0",
-        "form-data-encoder": "^4.0.2",
-        "formdata-node": "^6.0.3",
-        "human-id": "^4.1.1",
-        "node-fetch": "2.7.0",
-        "qs": "6.11.2",
-        "readable-stream": "^4.5.2",
-        "url-join": "4.0.1",
-        "ws": "^8.15.13"
-      }
-    },
-    "node_modules/@cartesia/cartesia-js/node_modules/form-data": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.1.tgz",
-      "integrity": "sha512-tzN8e4TX8+kkxGPK8D5u0FNmjPUjw3lwC9lSLxxoB/+GtsJG91CO8bSWy73APlgAZzZbXEYZJuxjkHH2w+Ezhw==",
-      "license": "MIT",
-      "dependencies": {
-        "asynckit": "^0.4.0",
-        "combined-stream": "^1.0.8",
-        "mime-types": "^2.1.12"
-      },
-      "engines": {
-        "node": ">= 6"
-      }
-    },
-    "node_modules/@cartesia/cartesia-js/node_modules/form-data-encoder": {
-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/form-data-encoder/-/form-data-encoder-4.0.2.tgz",
-      "integrity": "sha512-KQVhvhK8ZkWzxKxOr56CPulAhH3dobtuQ4+hNQ+HekH/Wp5gSOafqRAeTphQUJAIk0GBvHZgJ2ZGRWd5kphMuw==",
-      "license": "MIT",
-      "engines": {
-        "node": ">= 18"
-      }
-    },
-    "node_modules/@cartesia/cartesia-js/node_modules/formdata-node": {
-      "version": "6.0.3",
-      "resolved": "https://registry.npmjs.org/formdata-node/-/formdata-node-6.0.3.tgz",
-      "integrity": "sha512-8e1++BCiTzUno9v5IZ2J6bv4RU+3UKDmqWUQD0MIMVCd9AdhWkO1gw57oo1mNEX1dMq2EGI+FbWz4B92pscSQg==",
-      "license": "MIT",
-      "engines": {
-        "node": ">= 18"
-      }
-    },
-    "node_modules/@cartesia/cartesia-js/node_modules/readable-stream": {
-      "version": "4.5.2",
-      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-4.5.2.tgz",
-      "integrity": "sha512-yjavECdqeZ3GLXNgRXgeQEdz9fvDDkNKyHnbHRFtOr7/LcfgBcmct7t/ET+HaCTqfh06OzoAxrkN/IfjJBVe+g==",
-      "license": "MIT",
-      "dependencies": {
-        "abort-controller": "^3.0.0",
-        "buffer": "^6.0.3",
-        "events": "^3.3.0",
-        "process": "^0.11.10",
-        "string_decoder": "^1.3.0"
-      },
-      "engines": {
-        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
-      }
-    },
-    "node_modules/@cartesia/cartesia-js/node_modules/ws": {
-      "version": "8.18.0",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.0.tgz",
-      "integrity": "sha512-8VbfWfHLbbwu3+N6OKsOMpBdT4kXPDDB9cJk2bJ6mh9ucxdlnNvH1e+roYkKmN9Nxw2yjz7VzeO9oOz2zJ04Pw==",
-      "license": "MIT",
-      "engines": {
-        "node": ">=10.0.0"
-      },
-      "peerDependencies": {
-        "bufferutil": "^4.0.1",
-        "utf-8-validate": ">=5.0.2"
-      },
-      "peerDependenciesMeta": {
-        "bufferutil": {
-          "optional": true
-        },
-        "utf-8-validate": {
-          "optional": true
-        }
-      }
-    },
    "node_modules/@eslint-community/eslint-utils": {
      "version": "4.4.0",
      "resolved": "https://registry.npmjs.org/@eslint-community/eslint-utils/-/eslint-utils-4.4.0.tgz",
@@ -1317,10 +1230,9 @@
      }
    },
    "node_modules/@google-cloud/text-to-speech": {
-      "version": "5.5.0",
-      "resolved": "https://registry.npmjs.org/@google-cloud/text-to-speech/-/text-to-speech-5.5.0.tgz",
-      "integrity": "sha512-Cw/UK2Y3l31Vsuozu8cxsmVS/09fShimes0tRLgDbOY2ZMG1Dckb6Zf/Q3Nxg4X0feFep44pvwNmyHKrOnl9SQ==",
-      "license": "Apache-2.0",
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/@google-cloud/text-to-speech/-/text-to-speech-5.0.2.tgz",
+      "integrity": "sha512-Q11Ddh9eHKSDA3E/KSqMITgVprXb0XgIKuJP9F5ScJ1T9h+DNrbgIU7shd0QOlPqb8ruQRiTOqL08+Mq5R89Ow==",
      "dependencies": {
        "google-gax": "^4.0.3"
      },
@@ -2673,11 +2585,6 @@
      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
      "dev": true
    },
-    "node_modules/base-64": {
-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/base-64/-/base-64-0.1.0.tgz",
-      "integrity": "sha512-Y5gU45svrR5tI2Vt/X9GPd3L0HNIKzGu202EjxrXMpuc2V2CiKgemAbUUsqYmZJvPtCXoUKjNZwBJzsNScUbXA=="
-    },
    "node_modules/base64-js": {
      "version": "1.5.1",
      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
@@ -2778,6 +2685,7 @@
      "version": "6.0.3",
      "resolved": "https://registry.npmjs.org/buffer/-/buffer-6.0.3.tgz",
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-      "integrity": "sha512-Y5gU45svrR5tI2Vt/X9GPd3L0HNIKzGu202EjxrXMpuc2V2CiKgemAbUUsqYmZJvPtCXoUKjNZwBJzsNScUbXA=="
-    },
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      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
@@ -9628,6 +9399,7 @@
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      "resolved": "https://registry.npmjs.org/buffer/-/buffer-6.0.3.tgz",
      "integrity": "sha512-FTiCpNxtwiZZHEZbcbTIcZjERVICn9yq/pDFkTl95/AxzD1naBctN7YO68riM/gLSDY7sdrMby8hofADYuuqOA==",
+      "dev": true,
      "requires": {
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        "ieee754": "^1.2.1"
@@ -9667,6 +9439,7 @@
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      "resolved": "https://registry.npmjs.org/call-bind/-/call-bind-1.0.7.tgz",
      "integrity": "sha512-GHTSNSYICQ7scH7sZ+M2rFopRoLh8t2bLSW6BbgrtLsahOIB5iyAVJf9GjWK3cYTDaMj4XdBpM1cA6pIS0Kv2w==",
+      "dev": true,
      "requires": {
        "es-define-property": "^1.0.0",
        "es-errors": "^1.3.0",
@@ -9706,11 +9479,6 @@
        "supports-color": "^7.1.0"
      }
    },
-    "charenc": {
-      "version": "0.0.2",
-      "resolved": "https://registry.npmjs.org/charenc/-/charenc-0.0.2.tgz",
-      "integrity": "sha512-yrLQ/yVUFXkzg7EDQsPieE/53+0RlaWTs+wBrvW36cyilJ2SaDWfl4Yj7MtLTXleV9uEKefbAGUPv2/iWSooRA=="
-    },
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      "resolved": "https://registry.npmjs.org/clean-stack/-/clean-stack-2.2.0.tgz",
@@ -9791,11 +9559,6 @@
        "which": "^2.0.1"
      }
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-    "crypt": {
-      "version": "0.0.2",
-      "resolved": "https://registry.npmjs.org/crypt/-/crypt-0.0.2.tgz",
-      "integrity": "sha512-mCxBlsHFYh9C+HVpiEacem8FEBnMXgU9gy4zmNC+SXAZNB/1idgp/aulFJ4FgCi7GPEVbfyng092GqL2k2rmow=="
-    },
    "d": {
      "version": "1.0.1",
      "resolved": "https://registry.npmjs.org/d/-/d-1.0.1.tgz",
@@ -9864,6 +9627,7 @@
      "version": "1.1.4",
      "resolved": "https://registry.npmjs.org/define-data-property/-/define-data-property-1.1.4.tgz",
      "integrity": "sha512-rBMvIzlpA8v6E+SJZoo++HAYqsLrkg7MSfIinMPFhmkorw7X+dOXVJQs+QT69zGkzMyfDnIMN2Wid1+NbL3T+A==",
+      "dev": true,
      "requires": {
        "es-define-property": "^1.0.0",
        "es-errors": "^1.3.0",
@@ -9902,15 +9666,6 @@
      "resolved": "https://registry.npmjs.org/diff-sequences/-/diff-sequences-26.6.2.tgz",
      "integrity": "sha512-Mv/TDa3nZ9sbc5soK+OoA74BsS3mL37yixCvUAQkiuA4Wz6YtwP/K47n2rv2ovzHZvoiQeA5FTQOschKkEwB0Q=="
    },
-    "digest-fetch": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/digest-fetch/-/digest-fetch-1.3.0.tgz",
-      "integrity": "sha512-CGJuv6iKNM7QyZlM2T3sPAdZWd/p9zQiRNS9G+9COUCwzWFTs0Xp8NF5iePx7wtvhDykReiRRrSeNb4oMmB8lA==",
-      "requires": {
-        "base-64": "^0.1.0",
-        "md5": "^2.3.0"
-      }
-    },
    "dotenv": {
      "version": "6.2.0",
      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-6.2.0.tgz",
@@ -9950,11 +9705,6 @@
      "integrity": "sha512-xT1HVAu5xFn7bDfkjGQi9dNpMqGchUkebwf1GL7cZN32NSwwlHRPMSDJ1KN6HkS0bWUtndbSQZqvpQftKG2uFQ==",
      "dev": true
    },
-    "emittery": {
-      "version": "0.13.1",
-      "resolved": "https://registry.npmjs.org/emittery/-/emittery-0.13.1.tgz",
-      "integrity": "sha512-DeWwawk6r5yR9jFgnDKYt4sLS0LmHJJi3ZOnb5/JdbYwj3nW+FxQnHIjhBKz8YLC7oRNPVM9NQ47I3CVx34eqQ=="
-    },
    "emoji-regex": {
      "version": "8.0.0",
      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
@@ -10019,6 +9769,7 @@
      "version": "1.0.0",
      "resolved": "https://registry.npmjs.org/es-define-property/-/es-define-property-1.0.0.tgz",
      "integrity": "sha512-jxayLKShrEqqzJ0eumQbVhTYQM27CfT1T35+gCgDFoL82JLsXqTJ76zv6A0YLOgEnLUMvLzsDsGIrl8NFpT2gQ==",
+      "dev": true,
      "requires": {
        "get-intrinsic": "^1.2.4"
      }
@@ -10026,7 +9777,8 @@
    "es-errors": {
      "version": "1.3.0",
      "resolved": "https://registry.npmjs.org/es-errors/-/es-errors-1.3.0.tgz",
-      "integrity": "sha512-Zf5H2Kxt2xjTvbJvP2ZWLEICxA6j+hAmMzIlypy4xcBg1vKVnx89Wy0GbS+kf5cwCVFFzdCFh2XSCFNULS6csw=="
+      "integrity": "sha512-Zf5H2Kxt2xjTvbJvP2ZWLEICxA6j+hAmMzIlypy4xcBg1vKVnx89Wy0GbS+kf5cwCVFFzdCFh2XSCFNULS6csw==",
+      "dev": true
    },
    "es-get-iterator": {
      "version": "1.1.3",
@@ -10277,7 +10029,8 @@
    "events": {
      "version": "3.3.0",
      "resolved": "https://registry.npmjs.org/events/-/events-3.3.0.tgz",
-      "integrity": "sha512-mQw+2fkQbALzQ7V0MY0IqdnXNOeTtP4r0lN9z7AAawCXgqea7bDii20AYrIBrFd/Hx0M2Ocz6S111CaFkUcb0Q=="
+      "integrity": "sha512-mQw+2fkQbALzQ7V0MY0IqdnXNOeTtP4r0lN9z7AAawCXgqea7bDii20AYrIBrFd/Hx0M2Ocz6S111CaFkUcb0Q==",
+      "dev": true
    },
    "expect": {
      "version": "26.6.2",
@@ -10492,7 +10245,8 @@
    "function-bind": {
      "version": "1.1.2",
      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.2.tgz",
-      "integrity": "sha512-7XHNxH7qX9xG5mIwxkhumTox/MIRNcOgDrxWsMt2pAr23WHp6MrRlN7FBSFpCpr+oVO0F744iUgR82nJMfG2SA=="
+      "integrity": "sha512-7XHNxH7qX9xG5mIwxkhumTox/MIRNcOgDrxWsMt2pAr23WHp6MrRlN7FBSFpCpr+oVO0F744iUgR82nJMfG2SA==",
+      "dev": true
    },
    "function.prototype.name": {
      "version": "1.1.6",
@@ -10547,6 +10301,7 @@
      "version": "1.2.4",
      "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.2.4.tgz",
      "integrity": "sha512-5uYhsJH8VJBTv7oslg4BznJYhDoRI6waYCxMmCdnTrcCrHA/fCFKoTFz2JKKE0HdDFUF7/oQuhzumXJK7paBRQ==",
+      "dev": true,
      "requires": {
        "es-errors": "^1.3.0",
        "function-bind": "^1.1.2",
@@ -10649,6 +10404,7 @@
      "version": "1.0.1",
      "resolved": "https://registry.npmjs.org/gopd/-/gopd-1.0.1.tgz",
      "integrity": "sha512-d65bNlIadxvpb/A2abVdlqKqV563juRnZ1Wtk6s1sIR8uNsXR70xqIzVqxVf1eTqDunwT2MkczEeaezCKTZhwA==",
+      "dev": true,
      "requires": {
        "get-intrinsic": "^1.1.3"
      }
@@ -10692,6 +10448,7 @@
      "version": "1.0.2",
      "resolved": "https://registry.npmjs.org/has-property-descriptors/-/has-property-descriptors-1.0.2.tgz",
      "integrity": "sha512-55JNKuIW+vq4Ke1BjOTjM2YctQIvCT7GFzHwmfZPGo5wnrgkid0YQtnAleFSqumZm4az3n2BS+erby5ipJdgrg==",
+      "dev": true,
      "requires": {
        "es-define-property": "^1.0.0"
      }
@@ -10699,12 +10456,14 @@
    "has-proto": {
      "version": "1.0.1",
      "resolved": "https://registry.npmjs.org/has-proto/-/has-proto-1.0.1.tgz",
-      "integrity": "sha512-7qE+iP+O+bgF9clE5+UoBFzE65mlBiVj3tKCrlNQ0Ogwm0BjpT/gK4SlLYDMybDh5I3TCTKnPPa0oMG7JDYrhg=="
+      "integrity": "sha512-7qE+iP+O+bgF9clE5+UoBFzE65mlBiVj3tKCrlNQ0Ogwm0BjpT/gK4SlLYDMybDh5I3TCTKnPPa0oMG7JDYrhg==",
+      "dev": true
    },
    "has-symbols": {
      "version": "1.0.3",
      "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.0.3.tgz",
-      "integrity": "sha512-l3LCuF6MgDNwTDKkdYGEihYjt5pRPbEg46rtlmnSPlUbgmB8LOIrKJbYYFBSbnPaJexMKtiPO8hmeRjRz2Td+A=="
+      "integrity": "sha512-l3LCuF6MgDNwTDKkdYGEihYjt5pRPbEg46rtlmnSPlUbgmB8LOIrKJbYYFBSbnPaJexMKtiPO8hmeRjRz2Td+A==",
+      "dev": true
    },
    "has-tostringtag": {
      "version": "1.0.0",
@@ -10737,6 +10496,7 @@
      "version": "2.0.2",
      "resolved": "https://registry.npmjs.org/hasown/-/hasown-2.0.2.tgz",
      "integrity": "sha512-0hJU9SCPvmMzIBdZFqNPXWa6dqh7WdH0cII9y+CyS8rG3nL48Bclra9HmKhVVUHyPWNH5Y7xDwAB7bfgSjkUMQ==",
+      "dev": true,
      "requires": {
        "function-bind": "^1.1.2"
      }
@@ -10776,11 +10536,6 @@
        }
      }
    },
-    "human-id": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/human-id/-/human-id-4.1.1.tgz",
-      "integrity": "sha512-3gKm/gCSUipeLsRYZbbdA1BD83lBoWUkZ7G9VFrhWPAU76KwYo5KR8V28bpoPm/ygy0x5/GCbpRQdY7VLYCoIg=="
-    },
    "humanize-ms": {
      "version": "1.2.1",
      "resolved": "https://registry.npmjs.org/humanize-ms/-/humanize-ms-1.2.1.tgz",
@@ -10973,11 +10728,6 @@
        "has-tostringtag": "^1.0.0"
      }
    },
-    "is-buffer": {
-      "version": "1.1.6",
-      "resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-1.1.6.tgz",
-      "integrity": "sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w=="
-    },
    "is-callable": {
      "version": "1.2.7",
      "resolved": "https://registry.npmjs.org/is-callable/-/is-callable-1.2.7.tgz",
@@ -11538,16 +11288,6 @@
        }
      }
    },
-    "md5": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/md5/-/md5-2.3.0.tgz",
-      "integrity": "sha512-T1GITYmFaKuO91vxyoQMFETst+O71VUPEU3ze5GNzDm0OWdP8v1ziTaAEPUr/3kLsY3Sftgz242A1SetQiDL7g==",
-      "requires": {
-        "charenc": "0.0.2",
-        "crypt": "0.0.2",
-        "is-buffer": "~1.1.6"
-      }
-    },
    "micromatch": {
      "version": "4.0.5",
      "resolved": "https://registry.npmjs.org/micromatch/-/micromatch-4.0.5.tgz",
@@ -11835,7 +11575,8 @@
    "object-inspect": {
      "version": "1.13.1",
      "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.13.1.tgz",
-      "integrity": "sha512-5qoj1RUiKOMsCCNLV1CBiPYE10sziTsnmNxkAI/rZhiD63CF7IqdFGC/XzjWjpSgLf0LxXX3bDFIh0E18f6UhQ=="
+      "integrity": "sha512-5qoj1RUiKOMsCCNLV1CBiPYE10sziTsnmNxkAI/rZhiD63CF7IqdFGC/XzjWjpSgLf0LxXX3bDFIh0E18f6UhQ==",
+      "dev": true
    },
    "object-is": {
      "version": "1.1.5",
@@ -11880,19 +11621,17 @@
      }
    },
    "openai": {
-      "version": "4.25.0",
-      "resolved": "https://registry.npmjs.org/openai/-/openai-4.25.0.tgz",
-      "integrity": "sha512-qLMFOizjxKuDfQkBrczZPYo6XVL4bdcuz9MR11Q+M91kGcs8dQw+O90nRcC+qWuhaGphQkfXQJMn4cd7Yew3Kg==",
+      "version": "4.53.2",
+      "resolved": "https://registry.npmjs.org/openai/-/openai-4.53.2.tgz",
+      "integrity": "sha512-ohYEv6OV3jsFGqNrgolDDWN6Ssx1nFg6JDJQuaBFo4SL2i+MBoOQ16n2Pq1iBF5lH1PKnfCIOfqAGkmzPvdB9g==",
      "requires": {
        "@types/node": "^18.11.18",
        "@types/node-fetch": "^2.6.4",
        "abort-controller": "^3.0.0",
        "agentkeepalive": "^4.2.1",
-        "digest-fetch": "^1.3.0",
        "form-data-encoder": "1.7.2",
        "formdata-node": "^4.3.2",
-        "node-fetch": "^2.6.7",
-        "web-streams-polyfill": "^3.2.1"
+        "node-fetch": "^2.6.7"
      },
      "dependencies": {
        "@types/node": {
@@ -12131,7 +11870,8 @@
    "process": {
      "version": "0.11.10",
      "resolved": "https://registry.npmjs.org/process/-/process-0.11.10.tgz",
-      "integrity": "sha512-cdGef/drWFoydD1JsMzuFf8100nZl+GT+yacc2bEced5f9Rjk4z+WtFUTBu9PhOi9j/jfmBPu0mMEY4wIdAF8A=="
+      "integrity": "sha512-cdGef/drWFoydD1JsMzuFf8100nZl+GT+yacc2bEced5f9Rjk4z+WtFUTBu9PhOi9j/jfmBPu0mMEY4wIdAF8A==",
+      "dev": true
    },
    "process-on-spawn": {
      "version": "1.0.0",
@@ -12190,14 +11930,6 @@
      "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.1.tgz",
      "integrity": "sha512-vYt7UD1U9Wg6138shLtLOvdAu+8DsC/ilFtEVHcH+wydcSpNE20AfSOduf6MkRFahL5FY7X1oU7nKVZFtfq8Fg=="
    },
-    "qs": {
-      "version": "6.11.2",
-      "resolved": "https://registry.npmjs.org/qs/-/qs-6.11.2.tgz",
-      "integrity": "sha512-tDNIz22aBzCDxLtVH++VnTfzxlfeK5CbqohpSqpJgj1Wg/cQbStNAz3NuqCs5vV+pjBsK4x4pN9HlVh7rcYRiA==",
-      "requires": {
-        "side-channel": "^1.0.4"
-      }
-    },
    "querystringify": {
      "version": "2.2.0",
      "resolved": "https://registry.npmjs.org/querystringify/-/querystringify-2.2.0.tgz",
@@ -12402,6 +12134,7 @@
      "version": "1.2.2",
      "resolved": "https://registry.npmjs.org/set-function-length/-/set-function-length-1.2.2.tgz",
      "integrity": "sha512-pgRc4hJ4/sNjWCSS9AmnS40x3bNMDTknHgL5UaMBTMyJnU90EgWh1Rz+MC9eFu4BuN/UwZjKQuY/1v3rM7HMfg==",
+      "dev": true,
      "requires": {
        "define-data-property": "^1.1.4",
        "es-errors": "^1.3.0",
@@ -12441,6 +12174,7 @@
      "version": "1.0.4",
      "resolved": "https://registry.npmjs.org/side-channel/-/side-channel-1.0.4.tgz",
      "integrity": "sha512-q5XPytqFEIKHkGdiMIrY10mvLRvnQh42/+GoBlFW3b2LXLE2xxJpZFdm94we0BaoV3RwJyGqg5wS7epxTv0Zvw==",
+      "dev": true,
      "requires": {
        "call-bind": "^1.0.0",
        "get-intrinsic": "^1.0.2",
@@ -12888,11 +12622,6 @@
        "punycode": "^2.1.0"
      }
    },
-    "url-join": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/url-join/-/url-join-4.0.1.tgz",
-      "integrity": "sha512-jk1+QP6ZJqyOiuEI9AEWQfju/nB2Pw466kbA0LEZljHwKeMgd9WrAEgEGxjPDD2+TNbbb37rTyhEfrCXfuKXnA=="
-    },
    "url-parse": {
      "version": "1.5.10",
      "resolved": "https://registry.npmjs.org/url-parse/-/url-parse-1.5.10.tgz",
@@ -12921,11 +12650,6 @@
      "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg==",
      "dev": true
    },
-    "web-streams-polyfill": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/web-streams-polyfill/-/web-streams-polyfill-3.2.1.tgz",
-      "integrity": "sha512-e0MO3wdXWKrLbL0DgGnUV7WHVuw9OUvL4hjgnPkIeEvESk74gAITi5G606JtZPp39cd8HA9VQzCIvA49LpPN5Q=="
-    },
    "webidl-conversions": {
      "version": "3.0.1",
      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
@@ -1,6 +1,6 @@
 {
  "name": "@jambonz/speech-utils",
-  "version": "0.2.3",
+  "version": "0.1.15",
  "description": "TTS-related speech utilities for jambonz",
  "main": "index.js",
  "author": "Dave Horton",
@@ -28,8 +28,7 @@
  "dependencies": {
    "@aws-sdk/client-polly": "^3.496.0",
    "@aws-sdk/client-sts": "^3.496.0",
-    "@cartesia/cartesia-js": "^2.1.0",
-    "@google-cloud/text-to-speech": "^5.5.0",
+    "@google-cloud/text-to-speech": "^5.0.2",
    "@grpc/grpc-js": "^1.9.14",
    "@jambonz/realtimedb-helpers": "^0.8.7",
    "bent": "^7.3.12",
@@ -38,7 +37,7 @@
    "google-protobuf": "^3.21.2",
    "ibm-watson": "^8.0.0",
    "microsoft-cognitiveservices-speech-sdk": "1.38.0",
-    "openai": "^4.25.0",
+    "openai": "^4.53.2",
    "undici": "^6.4.0"
  },
  "devDependencies": {
@@ -5,7 +5,7 @@ const fs = require('fs');
 const {makeSynthKey} = require('../lib/utils');
 const logger = require('pino')();
 const bent = require('bent');
-const getJSON = bent('json');
+const getJSON = bent('json')

 process.on('unhandledRejection', (reason, p) => {
  console.log('Unhandled Rejection at: Promise', p, 'reason:', reason);
@@ -91,17 +91,14 @@ test('Google speech Custom voice synth tests', async(t) => {
  const fn = require('..');
  const {synthAudio, client} = fn(opts, logger);

-  if (!process.env.GCP_CUSTOM_VOICE_FILE &&
-    !process.env.GCP_CUSTOM_VOICE_JSON_KEY ||
-    !process.env.GCP_CUSTOM_VOICE_MODEL) {
-    t.pass(`skipping google speech synth tests since neither 
-GCP_CUSTOM_VOICE_FILE nor GCP_CUSTOM_VOICE_JSON_KEY provided, GCP_CUSTOM_VOICE_MODEL is not provided`);
+  if (!process.env.GCP_CUSTOM_VOICE_FILE && !process.env.GCP_CUSTOM_VOICE_JSON_KEY || !process.env.GCP_CUSTOM_VOICE_MODEL) {
+    t.pass('skipping google speech synth tests since neither GCP_CUSTOM_VOICE_FILE nor GCP_CUSTOM_VOICE_JSON_KEY provided, GCP_CUSTOM_VOICE_MODEL is not provided');
    return t.end();
  }
  try {
    const str = process.env.GCP_CUSTOM_VOICE_JSON_KEY || fs.readFileSync(process.env.GCP_CUSTOM_VOICE_FILE);
    const creds = JSON.parse(str);
-    const opts = await synthAudio(stats, {
+    let opts = await synthAudio(stats, {
      vendor: 'google',
      credentials: {
        credentials: {
@@ -112,7 +109,7 @@ GCP_CUSTOM_VOICE_FILE nor GCP_CUSTOM_VOICE_JSON_KEY provided, GCP_CUSTOM_VOICE_M
      language: 'en-AU',
      text: 'This is a test.  This is only a test',
      voice: {
-        reportedUsage: 'REALTIME',
+        reportedUsage:"REALTIME",
        model: process.env.GCP_CUSTOM_VOICE_MODEL
      }
    });
@@ -124,48 +121,6 @@ GCP_CUSTOM_VOICE_FILE nor GCP_CUSTOM_VOICE_JSON_KEY provided, GCP_CUSTOM_VOICE_M
  client.quit();
 });

-test('Google speech voice cloning synth tests', async(t) => {
-  const fn = require('..');
-  const {synthAudio, client} = fn(opts, logger);
-
-  if (!process.env.GCP_CUSTOM_VOICE_FILE &&
-    !process.env.GCP_CUSTOM_VOICE_JSON_KEY ||
-    !process.env.GCP_VOICE_CLONING_FILE &&
-    !process.env.GCP_VOICE_CLONING_JSON_KEY) {
-    t.pass(`skipping google speech synth tests since neither 
-GCP_CUSTOM_VOICE_FILE nor GCP_CUSTOM_VOICE_JSON_KEY provided,
-GCP_VOICE_CLONING_FILE nor GCP_VOICE_CLONING_JSON_KEY is not provided`);
-    return t.end();
-  }
-  try {
-    const googleKey = process.env.GCP_CUSTOM_VOICE_JSON_KEY ||
-      fs.readFileSync(process.env.GCP_CUSTOM_VOICE_FILE);
-    const voice_cloning_key = process.env.GCP_VOICE_CLONING_JSON_KEY ||
-      fs.readFileSync(process.env.GCP_VOICE_CLONING_FILE).toString();
-    const creds = JSON.parse(googleKey);
-    const opts = await synthAudio(stats, {
-      vendor: 'google',
-      credentials: {
-        credentials: {
-          client_email: creds.client_email,
-          private_key: creds.private_key,
-          project_id: creds.project_id
-        },
-      },
-      language: 'en-US',
-      text: 'This is a test. This is only a test. This is a test. This is only a test. This is a test. This is only a test',
-      voice: {
-        voice_cloning_key
-      }
-    });
-    t.ok(!opts.servedFromCache, `successfully synthesized google voice cloning audio to ${opts.filePath}`);
-  } catch (err) {
-    console.error(err);
-    t.end(err);
-  }
-  client.quit();
-});
-
 test('AWS speech synth tests', async(t) => {
  const fn = require('..');
  const {synthAudio, client} = fn(opts, logger);
@@ -554,7 +509,6 @@ test('Custom Vendor speech synth tests', async(t) => {
      text: 'This is a test.  This is only a test',
    });
    t.ok(!opts.servedFromCache, `successfully synthesized custom vendor audio to ${opts.filePath}`);
-    t.ok(opts.filePath.endsWith('wav'), 'audio is cached as wav file');
    let obj = await getJSON(`http://127.0.0.1:3100/lastRequest/somethingnew`);
    t.ok(obj.headers.Authorization == 'Bearer some_jwt_token', 'Custom Vendor Authentication Header is correct');
    t.ok(obj.body.language == 'en-US', 'Custom Vendor Language is correct');
@@ -562,21 +516,6 @@ test('Custom Vendor speech synth tests', async(t) => {
    t.ok(obj.body.type == 'text', 'Custom Vendor type is correct');
    t.ok(obj.body.text == 'This is a test.  This is only a test', 'Custom Vendor text is correct');

-    // Checking if cache is stored with wav format
-    opts = await synthAudio(stats, {
-      vendor: 'custom:somethingnew',
-      credentials: {
-        use_for_tts: 1,
-        custom_tts_url: "http://127.0.0.1:3100/somethingnew",
-        auth_token: 'some_jwt_token'
-      },
-      language: 'en-US',
-      voice: 'English-US.Female-1',
-      text: 'This is a test.  This is only a test',
-    });
-    t.ok(opts.servedFromCache, `successfully get custom vendor cached audio to ${opts.filePath}`);
-    t.ok(opts.filePath.endsWith('wav'), 'audio is cached as wav file');
-
    opts = await synthAudio(stats, {
      vendor: 'custom:somethingnew2',
      credentials: {
@@ -635,9 +574,9 @@ test('Elevenlabs speech synth tests', async(t) => {
    t.end(err);
  }
  client.quit();
-});
+})

-const testPlayHT = async(t, voice_engine) => {
+test('PlayHT speech synth tests', async(t) => {
  const fn = require('..');
  const {synthAudio, client} = fn(opts, logger);

@@ -645,26 +584,26 @@ const testPlayHT = async(t, voice_engine) => {
    t.pass('skipping PlayHT speech synth tests since PLAYHT_API_KEY or PLAYHT_USER_ID is/are not provided');
    return t.end();
  }
-  const text = 'Hi there and welcome to jambones! ' + Date.now();
+  const text = 'Hi there and welcome to jambones!';
  try {
-    const opts = await synthAudio(stats, {
+    let opts = await synthAudio(stats, {
      vendor: 'playht',
      credentials: {
        api_key: process.env.PLAYHT_API_KEY,
        user_id: process.env.PLAYHT_USER_ID,
-        voice_engine,
+        voice_engine: 'PlayHT2.0-turbo',
        options: JSON.stringify({
-          quality: 'medium',
+          quality: "medium",
          speed: 1,
          seed: 1,
          temperature: 1,
-          emotion: 'female_happy',
+          emotion: "female_happy",
          voice_guidance: 3,
          style_guidance: 20,
          text_guidance: 1,
        })
      },
-      language: 'english',
+      language: 'en-US',
      voice: 's3://voice-cloning-zero-shot/d9ff78ba-d016-47f6-b0ef-dd630f59414e/female-cs/manifest.json',
      text,
      renderForCaching: true
@@ -676,51 +615,9 @@ const testPlayHT = async(t, voice_engine) => {
    t.end(err);
  }
  client.quit();
-};
-
-test('PlayHT speech synth tests', async(t) => {
-  await testPlayHT(t, 'PlayHT2.0-turbo');
 });

-test('PlayHT3.0 speech synth tests', async(t) => {
-  await testPlayHT(t, 'Play3.0');
-});
-
-test('Cartesia speech synth tests', async(t) => {
-  const fn = require('..');
-  const {synthAudio, client} = fn(opts, logger);
-
-  if (!process.env.CARTESIA_API_KEY) {
-    t.pass('skipping Cartesia speech synth tests since CARTESIA_API_KEY is not provided');
-    return t.end();
-  }
-  const text = 'Hi there and welcome to jambones! ' + Date.now();
-  try {
-    const opts = await synthAudio(stats, {
-      vendor: 'cartesia',
-      credentials: {
-        api_key: process.env.CARTESIA_API_KEY,
-        model_id: 'sonic-english',
-        options: JSON.stringify({
-          speed: 1,
-          emotion: 'female_happy',
-        })
-      },
-      language: 'en',
-      voice: '694f9389-aac1-45b6-b726-9d9369183238',
-      text,
-      renderForCaching: true
-    });
-    t.ok(!opts.servedFromCache, `successfully playht eleven audio to ${opts.filePath}`);
-
-  } catch (err) {
-    console.error(JSON.stringify(err));
-    t.end(err);
-  }
-  client.quit();
-});
-
-test('rimelabs speech synth tests mist', async(t) => {
+test('rimelabs speech synth tests', async(t) => {
  const fn = require('..');
  const {synthAudio, client} = fn(opts, logger);

@@ -730,7 +627,7 @@ test('rimelabs speech synth tests mist', async(t) => {
  }
  const text = 'Hi there and welcome to jambones!';
  try {
-    const opts = await synthAudio(stats, {
+    let opts = await synthAudio(stats, {
      vendor: 'rimelabs',
      credentials: {
        api_key: process.env.RIMELABS_API_KEY,
@@ -740,7 +637,7 @@ test('rimelabs speech synth tests mist', async(t) => {
          reduceLatency: false
        })
      },
-      language: 'eng',
+      language: 'en-US',
      voice: 'amber',
      text,
      renderForCaching: true
@@ -754,40 +651,6 @@ test('rimelabs speech synth tests mist', async(t) => {
  client.quit();
 });

-test('rimelabs speech synth tests mistv2', async(t) => {
-  const fn = require('..');
-  const {synthAudio, client} = fn(opts, logger);
-
-  if (!process.env.RIMELABS_API_KEY) {
-    t.pass('skipping rimelabs speech synth tests since RIMELABS_API_KEY is not provided');
-    return t.end();
-  }
-  const text = 'Hi there and welcome to jambones!';
-  try {
-    const opts = await synthAudio(stats, {
-      vendor: 'rimelabs',
-      credentials: {
-        api_key: process.env.RIMELABS_API_KEY,
-        model_id: 'mistv2',
-        options: JSON.stringify({
-          speedAlpha: 1.0,
-          reduceLatency: false
-        })
-      },
-      language: 'spa',
-      voice: 'pablo',
-      text,
-      renderForCaching: true
-    });
-    t.ok(!opts.servedFromCache, `successfully synthesized rimelabs mistv2 audio to ${opts.filePath}`);
-
-  } catch (err) {
-    console.error(JSON.stringify(err));
-    t.end(err);
-  }
-  client.quit();
-});
-
 test('whisper speech synth tests', async(t) => {
  const fn = require('..');
  const {synthAudio, client} = fn(opts, logger);
@@ -887,11 +750,11 @@ test('TTS Cache tests', async(t) => {
    // save some random tts keys to cache
    const minRecords = 8;
    for (const i in Array(minRecords).fill(0)) {
-      await client.set(makeSynthKey({vendor: i, language: i, voice: i, engine: i, model: i, text: i}), i);
+      await client.set(makeSynthKey({vendor: i, language: i, voice: i, engine: i, text: i}), i);
    }
    const count = await getTtsSize();
    t.ok(count >= minRecords, 'getTtsSize worked.');
-
+    
    const {purgedCount} = await purgeTtsCache();
    t.ok(purgedCount >= minRecords, `successfully purged at least ${minRecords} tts records from cache`);

@@ -922,15 +785,24 @@ test('TTS Cache tests', async(t) => {
      language: 'non-existing',
      voice: 'non-existing',
    });
-    t.ok(purgedCountWhenErrored === 0, 'purged no records when specified key was not found');
-    t.ok(error, 'error returned when specified key was not found');
+    t.ok(purgedCountWhenErrored === 0, `purged no records when specified key was not found`);
+    t.ok(error, `error returned when specified key was not found`);

    // make sure other tts keys are still there
-    const cached = await client.keys('tts:*');
-    t.ok(cached.length >= 1, 'successfully kept all non-specified tts records in cache');
+    const cached = await client.keys('tts:*')
+    t.ok(cached.length >= 1, `successfully kept all non-specified tts records in cache`);

-    process.env.VG_TRIM_TTS_SILENCE = 'true';
+    // retrieve keys from cache and check the key contains the file extension    
+    let key = cached[0];
+    t.ok(key.includes('mp3'), `tts cache extension shoult be part of the key and equal mp3`);
+
+    process.env.VG_TRIM_TTS_SILENCE = 'true';    
    await client.set(makeSynthKey({ vendor: 'azure' }), 'value');
+
+    const r8Keys = await client.keys('tts:r8*');
+    key = r8Keys[0];
+    t.ok(key.includes('r8'), `tts cache extension shoult be part of the key and equal r8`);
+
  } catch (err) {
    console.error(JSON.stringify(err));
    t.end(err);