0.0.28

Feat/aws sts auth token

.github/workflows/ci.yml

@@ -24,4 +24,8 @@ jobs:
           IBM_TTS_API_KEY: ${{ secrets.IBM_TTS_API_KEY }}
           IBM_TTS_REGION: ${{ secrets.IBM_TTS_REGION }}
           MICROSOFT_API_KEY: ${{ secrets.MICROSOFT_API_KEY }}
-          MICROSOFT_REGION: ${{ secrets.MICROSOFT_REGION }}
+          MICROSOFT_REGION: ${{ secrets.MICROSOFT_REGION }}
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+          ELEVENLABS_API_KEY: ${{ secrets.ELEVENLABS_API_KEY }}
+          ELEVENLABS_VOICE_ID: ${{ secrets.ELEVENLABS_VOICE_ID }}
+          ELEVENLABS_MODEL_ID: ${{ secrets.ELEVENLABS_MODEL_ID }}

README.md

@@ -1,2 +1,3 @@
 # speech-utils
-TTS-related speech utilities for jambonz
+TTS-related speech utilities for jambonz.
+

index.js

@@ -1,33 +1,14 @@
 const {noopLogger} = require('./lib/utils');
-const Redis = require('ioredis');
 
 module.exports = (opts, logger) => {
   logger = logger || noopLogger;
-  const connectionOpts = {...opts};
-  // Support legacy app
-  if (process.env.JAMBONES_REDIS_USERNAME && process.env.JAMBONES_REDIS_PASSWORD) {
-    if (Array.isArray(connectionOpts)) {
-      for (const o of opts) {
-        o.username = process.env.JAMBONES_REDIS_USERNAME;
-        o.password = process.env.JAMBONES_REDIS_PASSWORD;
-      }
-    } else {
-      connectionOpts.username = process.env.JAMBONES_REDIS_USERNAME;
-      connectionOpts.password = process.env.JAMBONES_REDIS_PASSWORD;
-    }
-  }
-
-  const client = new Redis(connectionOpts);
-  ['ready', 'connect', 'reconnecting', 'error', 'end', 'warning']
-    .forEach((event) => {
-      client.on(event, (...args) => {
-        if ('error' === event) {
-          if (process.env.NODE_ENV === 'test' && args[0]?.code === 'ECONNREFUSED') return;
-          logger.error({...args}, '@jambonz/realtimedb-helpers - redis error');
-        }
-        else logger.debug({args}, `redis event ${event}`);
-      });
-    });
+  let client = opts.redis_client;
+  const {
+    client: redisClient,
+    createHash,
+    retrieveHash
+  } = require('@jambonz/realtimedb-helpers')(opts, logger);
+  client = opts.redis_client || redisClient;
 
   return {
     client,
@@ -36,6 +17,7 @@ module.exports = (opts, logger) => {
     synthAudio: require('./lib/synth-audio').bind(null, client, logger),
     getNuanceAccessToken: require('./lib/get-nuance-access-token').bind(null, client, logger),
     getIbmAccessToken: require('./lib/get-ibm-access-token').bind(null, client, logger),
+    getAwsAuthToken: require('./lib/get-aws-sts-token').bind(null, logger, createHash, retrieveHash),
     getTtsVoices: require('./lib/get-tts-voices').bind(null, client, logger),
   };
 };

lib/get-aws-sts-token.js

@@ -0,0 +1,45 @@
+const { STSClient, GetSessionTokenCommand } = require('@aws-sdk/client-sts');
+const {makeAwsKey, noopLogger} = require('./utils');
+const debug = require('debug')('jambonz:speech-utils');
+const EXPIRY = 3600;
+
+async function getAwsAuthToken(
+  logger,
+  createHash, retrieveHash,
+  awsAccessKeyId, awsSecretAccessKey, awsRegion) {
+  logger = logger || noopLogger;
+  try {
+    const key = makeAwsKey(awsAccessKeyId);
+    const obj = await retrieveHash(key);
+    if (obj) return {...obj, servedFromCache: true};
+
+    /* access token not found in cache, so generate it using STS */
+    const stsClient = new STSClient({
+      region: awsRegion,
+      credentials: {
+        accessKeyId: awsAccessKeyId,
+        secretAccessKey: awsSecretAccessKey,
+      }
+    });
+    const command = new GetSessionTokenCommand({DurationSeconds: EXPIRY});
+    const data = await stsClient.send(command);
+
+    const credentials = {
+      accessKeyId: data.Credentials.AccessKeyId,
+      secretAccessKey: data.Credentials.SecretAccessKey,
+      sessionToken: data.Credentials.SessionToken
+    };
+
+    /* expire 10 minutes before the hour, so we don't lose the use of it during a call */
+    createHash(key, credentials, EXPIRY - 600)
+      .catch((err) => logger.error(err, `Error saving hash for key ${key}`));
+
+    return {...credentials, servedFromCache: false};
+  } catch (err) {
+    debug(err, 'getAwsAuthToken: Error retrieving AWS auth token');
+    logger.error(err, 'getAwsAuthToken: Error retrieving AWS auth token');
+    throw err;
+  }
+}
+
+module.exports = getAwsAuthToken;

lib/synth-audio.js

@@ -14,7 +14,13 @@ const {
   CancellationDetails,
   SpeechSynthesisOutputFormat
 } = sdk;
-const {makeSynthKey, createNuanceClient, createKryptonClient, createRivaClient, noopLogger} = require('./utils');
+const {
+  makeSynthKey,
+  createNuanceClient,
+  createKryptonClient,
+  createRivaClient,
+  noopLogger
+} = require('./utils');
 const getNuanceAccessToken = require('./get-nuance-access-token');
 const {
   SynthesisRequest,
@@ -32,6 +38,25 @@ const {AudioEncoding} = require('../stubs/riva/proto/riva_audio_pb');
 const debug = require('debug')('jambonz:realtimedb-helpers');
 const EXPIRES = (process.env.JAMBONES_TTS_CACHE_DURATION_MINS || 4 * 60) * 60; // cache tts for 4 hours
 const TMP_FOLDER = '/tmp';
+const OpenAI = require('openai');
+
+
+const trimTrailingSilence = (buffer) => {
+  assert.ok(buffer instanceof Buffer, 'trimTrailingSilence - argument is not a Buffer');
+
+  let offset = buffer.length;
+  while (offset > 0) {
+    // Get 16-bit value from the buffer (read in reverse)
+    const value = buffer.readUInt16BE(offset - 2);
+    if (value !== 0) {
+      break;
+    }
+    offset -= 2;
+  }
+
+  // Trim the silence from the end
+  return offset === buffer.length ? buffer : buffer.subarray(0, offset);
+};
 
 /**
  * Synthesize speech to an mp3 file, and also cache the generated speech
@@ -58,7 +83,8 @@ async function synthAudio(client, logger, stats, { account_sid,
   let rtt;
   logger = logger || noopLogger;
 
-  assert.ok(['google', 'aws', 'polly', 'microsoft', 'wellsaid', 'nuance', 'nvidia', 'ibm'].includes(vendor) ||
+  assert.ok(['google', 'aws', 'polly', 'microsoft',
+    'wellsaid', 'nuance', 'nvidia', 'ibm', 'elevenlabs', 'whisper'].includes(vendor) ||
   vendor.startsWith('custom'),
   `synthAudio supported vendors are google, aws, microsoft, nuance, nvidia and wellsaid, not ${vendor}`);
   if ('google' === vendor) {
@@ -92,6 +118,14 @@ async function synthAudio(client, logger, stats, { account_sid,
     language = 'en-US'; // WellSaid only supports English atm
     assert.ok(voice, 'synthAudio requires voice when wellsaid is used');
     assert.ok(!text.startsWith('<speak'), 'wellsaid does not support SSML tags');
+  } else if ('elevenlabs' === vendor) {
+    assert.ok(voice, 'synthAudio requires voice when elevenlabs is used');
+    assert.ok(credentials.api_key, 'synthAudio requires api_key when elevenlabs is used');
+    assert.ok(credentials.model_id, 'synthAudio requires model_id when elevenlabs is used');
+  } else if ('whisper' === vendor) {
+    assert.ok(voice, 'synthAudio requires voice when whisper is used');
+    assert.ok(credentials.model_id, 'synthAudio requires model when whisper is used');
+    assert.ok(credentials.api_key, 'synthAudio requires api_key when whisper is used');
   } else  if (vendor.startsWith('custom')) {
     assert.ok(credentials.custom_tts_url, `synthAudio requires custom_tts_url in credentials when ${vendor} is used`);
   }
@@ -104,7 +138,12 @@ async function synthAudio(client, logger, stats, { account_sid,
     text
   });
   let filePath;
-  if (['nuance', 'nvidia'].includes(vendor)) {
+  if (['nuance', 'nvidia'].includes(vendor) ||
+    (
+      process.env.JAMBONES_TTS_TRIM_SILENCE &&
+      ['microsoft', 'azure'].includes(vendor)
+    )
+  ) {
     filePath = `${TMP_FOLDER}/${key.replace('tts:', `tts-${salt || ''}`)}.r8`;
   }
   else filePath = `${TMP_FOLDER}/${key.replace('tts:', `tts-${salt || ''}`)}.mp3`;
@@ -154,6 +193,12 @@ async function synthAudio(client, logger, stats, { account_sid,
       case 'wellsaid':
         audioBuffer = await synthWellSaid(logger, {credentials, stats, language, voice, text, filePath});
         break;
+      case 'elevenlabs':
+        audioBuffer = await synthElevenlabs(logger, {credentials, stats, language, voice, text, filePath});
+        break;
+      case 'whisper':
+        audioBuffer = await synthWhisper(logger, {credentials, stats, voice, text});
+        break;
       case vendor.startsWith('custom') ? vendor : 'cant_match_value':
         ({ audioBuffer, filePath } = await synthCustomVendor(logger,
           {credentials, stats, language, voice, text, filePath}));
@@ -224,7 +269,8 @@ const synthGoogle = async(logger, {credentials, stats, language, voice, gender,
   const client = new ttsGoogle.TextToSpeechClient(credentials);
   const opts = {
     voice: {
-      name: voice,
+      ...(typeof voice === 'string' && {name: voice}),
+      ...(typeof voice === 'object' && {customVoice: voice}),
       languageCode: language,
       ssmlGender: gender || 'SSML_VOICE_GENDER_UNSPECIFIED'
     },
@@ -274,6 +320,48 @@ const synthIbm = async(logger, {credentials, stats, voice, text}) => {
   }
 };
 
+async function _synthOnPremMicrosoft(logger, {
+  credentials,
+  stats,
+  language,
+  voice,
+  text,
+  filePath
+}) {
+  const {use_custom_tts, custom_tts_endpoint_url} = credentials;
+  let content = text;
+
+  if (use_custom_tts && !content.startsWith('<speak')) {
+    /**
+     * Note: it seems that to use custom voice ssml is required with the voice attribute
+     * Otherwise sending plain text we get "Voice does not match"
+     */
+    content = `<speak>${text}</speak>`;
+  }
+
+  if (content.startsWith('<speak>')) {
+    /* microsoft enforces some properties and uses voice xml element so if the user did not supply do it for them */
+    const words = content.slice(7, -8).trim().replace(/(\r\n|\n|\r)/gm, ' ');
+    // eslint-disable-next-line max-len
+    content = `<speak version="1.0" xmlns="http://www.w3.org/2001/10/synthesis" xmlns:mstts="https://www.w3.org/2001/mstts" xml:lang="${language}"><voice name="${voice}">${words}</voice></speak>`;
+    logger.info({content}, 'synthMicrosoft');
+  }
+
+  try {
+    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'
+    });
+    const mp3 = await post(custom_tts_endpoint_url, content);
+    return mp3;
+  } catch (err) {
+    logger.info({err}, '_synthMicrosoftByHttp returned error');
+    throw err;
+  }
+}
+
 const synthMicrosoft = async(logger, {
   credentials,
   stats,
@@ -283,21 +371,35 @@ const synthMicrosoft = async(logger, {
   filePath
 }) => {
   try {
-    const {api_key: apiKey, region, use_custom_tts, custom_tts_endpoint} = credentials;
+    const {api_key: apiKey, region, use_custom_tts, custom_tts_endpoint, custom_tts_endpoint_url} = credentials;
+    if (use_custom_tts && custom_tts_endpoint_url) {
+      return await _synthOnPremMicrosoft(logger, {
+        credentials,
+        stats,
+        language,
+        voice,
+        text,
+        filePath
+      });
+    }
+    const trimSilence = filePath.endsWith('.r8');
     let content = text;
     const speechConfig = SpeechConfig.fromSubscription(apiKey, region);
     speechConfig.speechSynthesisLanguage = language;
     speechConfig.speechSynthesisVoiceName = voice;
     if (use_custom_tts && custom_tts_endpoint) {
       speechConfig.endpointId = custom_tts_endpoint;
-
+    }
+    if (use_custom_tts && !content.startsWith('<speak')) {
       /**
        * Note: it seems that to use custom voice ssml is required with the voice attribute
        * Otherwise sending plain text we get "Voice does not match"
        */
-      if (!content.startsWith('<speak')) content = `<speak>${text}</speak>`;
+      content = `<speak>${text}</speak>`;
     }
-    speechConfig.speechSynthesisOutputFormat = SpeechSynthesisOutputFormat.Audio16Khz32KBitRateMonoMp3;
+    speechConfig.speechSynthesisOutputFormat = trimSilence ?
+      SpeechSynthesisOutputFormat.Raw8Khz16BitMonoPcm :
+      SpeechSynthesisOutputFormat.Audio16Khz32KBitRateMonoMp3;
     const synthesizer = new SpeechSynthesizer(speechConfig);
 
     if (content.startsWith('<speak>')) {
@@ -323,7 +425,9 @@ const synthMicrosoft = async(logger, {
               reject(cancellation.errorDetails);
               break;
             case ResultReason.SynthesizingAudioCompleted:
-              resolve(Buffer.from(result.audioData));
+              let buffer = Buffer.from(result.audioData);
+              if (trimSilence) buffer = trimTrailingSilence(buffer);
+              resolve(buffer);
               synthesizer.close();
               stats.increment('tts.count', ['vendor:microsoft', 'accepted:yes']);
               break;
@@ -481,6 +585,53 @@ const synthCustomVendor = async(logger, {credentials, stats, language, voice, te
   }
 };
 
+const synthElevenlabs = async(logger, {credentials, stats, language, voice, text}) => {
+  const {api_key, model_id} = credentials;
+  try {
+    const post = bent('https://api.elevenlabs.io', 'POST', 'buffer', {
+      'xi-api-key': api_key,
+      'Accept': 'audio/mpeg',
+      'Content-Type': 'application/json'
+    });
+    const mp3 = await post(`/v1/text-to-speech/${voice}`, {
+      text,
+      model_id,
+      voice_settings: {
+        stability: 0.5,
+        similarity_boost: 0.5
+      }
+    });
+    return mp3;
+  } catch (err) {
+    logger.info({err}, 'synth Elevenlabs returned error');
+    stats.increment('tts.count', ['vendor:elevenlabs', 'accepted:no']);
+    throw err;
+  }
+};
+
+const synthWhisper = async(logger, {credentials, stats, voice, text}) => {
+  const {api_key, model_id, baseURL, timeout} = credentials;
+  try {
+    const openai = new OpenAI.OpenAI({
+      apiKey: api_key,
+      timeout: timeout || 5000,
+      ...(baseURL && {baseURL})
+    });
+
+    const mp3 = await openai.audio.speech.create({
+      model: model_id,
+      voice,
+      input: text,
+      response_format: 'mp3'
+    });
+    return Buffer.from(await mp3.arrayBuffer());
+  } catch (err) {
+    logger.info({err}, 'synth whisper returned error');
+    stats.increment('tts.count', ['vendor:openai', 'accepted:no']);
+    throw err;
+  }
+}
+;
 const getFileExtFromMime = (mime) => {
   switch (mime) {
     case 'audio/wav':

lib/utils.js

@@ -43,6 +43,12 @@ function makeIbmKey(apiKey) {
   return `ibm:${hash.digest('hex')}`;
 }
 
+function makeAwsKey(awsAccessKeyId) {
+  const hash = crypto.createHash('sha1');
+  hash.update(awsAccessKeyId);
+  return `aws:${hash.digest('hex')}`;
+}
+
 function makeNuanceKey(clientId, secret, scope) {
   const hash = crypto.createHash('sha1');
   hash.update(`${clientId}:${secret}:${scope}`);
@@ -106,11 +112,11 @@ const createRivaClient = async(rivaUri) => {
   return client;
 };
 
-
 module.exports = {
   makeSynthKey,
   makeNuanceKey,
   makeIbmKey,
+  makeAwsKey,
   getNuanceAccessToken,
   createNuanceClient,
   createKryptonClient,

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@jambonz/speech-utils",
-  "version": "0.0.15",
+  "version": "0.0.28",
   "description": "TTS-related speech utilities for jambonz",
   "main": "index.js",
   "author": "Dave Horton",
@@ -24,16 +24,18 @@
   },
   "homepage": "https://github.com/jambonz/speech-utils#readme",
   "dependencies": {
-    "@aws-sdk/client-polly": "^3.303.0",
+    "@aws-sdk/client-polly": "^3.359.0",
+    "@aws-sdk/client-sts": "^3.458.0",
     "@google-cloud/text-to-speech": "^4.2.1",
     "@grpc/grpc-js": "^1.8.13",
+    "@jambonz/realtimedb-helpers": "^0.8.7",
     "bent": "^7.3.12",
     "debug": "^4.3.4",
     "form-urlencoded": "^6.1.0",
     "google-protobuf": "^3.21.2",
     "ibm-watson": "^8.0.0",
-    "microsoft-cognitiveservices-speech-sdk": "^1.26.0",
-    "ioredis": "^5.3.2",
+    "microsoft-cognitiveservices-speech-sdk": "1.32.0",
+    "openai": "^4.16.2",
     "undici": "^5.21.0"
   },
   "devDependencies": {

test/aws.js

@@ -0,0 +1,40 @@
+const test = require('tape').test ;
+const config = require('config');
+const opts = config.get('redis');
+const logger = require('pino')({level: 'error'});
+process.on('unhandledRejection', (reason, p) => {
+  console.log('Unhandled Rejection at: Promise', p, 'reason:', reason);
+});
+
+const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
+
+test('AWS - create and cache auth token', async(t) => {
+  const fn = require('..');
+  const {client, getAwsAuthToken} = fn(opts, logger);
+
+  if (!process.env.AWS_ACCESS_KEY_ID || !process.env.AWS_SECRET_ACCESS_KEY || !process.env.AWS_REGION) {
+      t.pass('skipping AWS auth token tests since no AWS credentials provided');
+      t.end();
+      client.quit();
+      return;
+  }
+  try {
+    let obj = await getAwsAuthToken(process.env.AWS_ACCESS_KEY_ID, process.env.AWS_SECRET_ACCESS_KEY, process.env.AWS_REGION);
+    //console.log({obj}, 'received auth token from AWS');
+    t.ok(obj.sessionToken && !obj.servedFromCache, 'successfullY generated auth token from AWS');
+
+    await sleep(250);
+    obj = await getAwsAuthToken(process.env.AWS_ACCESS_KEY_ID, process.env.AWS_SECRET_ACCESS_KEY, process.env.AWS_REGION);
+    //console.log({obj}, 'received auth token from AWS - second request');
+    t.ok(obj.sessionToken && obj.servedFromCache, 'successfully received access token from cache');
+ 
+    await client.flushall();
+    t.end();
+  }
+  catch (err) {
+    console.error(err);
+    t.end(err);
+  }
+  client.quit();
+});
+

test/index.js

@@ -1,4 +1,7 @@
 require('./docker_start');
 require('./synth');
 require('./list-voices');
+require('./aws');
+require('./ibm');
+require('./nuance');
 require('./docker_stop');

test/synth.js

@@ -38,7 +38,7 @@ test('Google speech synth tests', async(t) => {
         },
       },
       language: 'en-GB',
-      gender: 'MALE',
+      gender: 'FEMALE',
       text: 'This is a test.  This is only a test',
       salt: 'foo.bar',
     });
@@ -53,7 +53,7 @@ test('Google speech synth tests', async(t) => {
         },
       },
       language: 'en-GB',
-      gender: 'MALE',
+      gender: 'FEMALE',
       text: 'This is a test.  This is only a test',
     });
     t.ok(opts.servedFromCache, `successfully retrieved cached google audio from ${opts.filePath}`);
@@ -68,7 +68,7 @@ test('Google speech synth tests', async(t) => {
       },
       disableTtsCache: true,
       language: 'en-GB',
-      gender: 'MALE',
+      gender: 'FEMALE',
       text: 'This is a test.  This is only a test',
     });
     t.ok(!opts.servedFromCache, `successfully synthesized google audio regardless of current cache to ${opts.filePath}`);
@@ -79,6 +79,40 @@ test('Google speech synth tests', async(t) => {
   client.quit();
 });
 
+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');
+    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);
+    let opts = await synthAudio(stats, {
+      vendor: 'google',
+      credentials: {
+        credentials: {
+          client_email: creds.client_email,
+          private_key: creds.private_key,
+        },
+      },
+      language: 'en-AU',
+      text: 'This is a test.  This is only a test',
+      voice: {
+        reportedUsage:"REALTIME",
+        model: process.env.GCP_CUSTOM_VOICE_MODEL
+      }
+    });
+    t.ok(!opts.servedFromCache, `successfully synthesized google custom voice 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);
@@ -411,6 +445,64 @@ test('Custom Vendor speech synth tests', async(t) => {
   client.quit();
 });
 
+test('Elevenlabs speech synth tests', async(t) => {
+  const fn = require('..');
+  const {synthAudio, client} = fn(opts, logger);
+
+  if (!process.env.ELEVENLABS_API_KEY || !process.env.ELEVENLABS_VOICE_ID || !process.env.ELEVENLABS_MODEL_ID) {
+    t.pass('skipping ElevenLabs speech synth tests since ELEVENLABS_API_KEY or ELEVENLABS_VOICE_ID or ELEVENLABS_MODEL_ID not provided');
+    return t.end();
+  }
+  const text = 'Hi there and welcome to jambones!';
+  try {
+    let opts = await synthAudio(stats, {
+      vendor: 'elevenlabs',
+      credentials: {
+        api_key: process.env.ELEVENLABS_API_KEY,
+        model_id: process.env.ELEVENLABS_MODEL_ID
+      },
+      language: 'en-US',
+      voice: process.env.ELEVENLABS_VOICE_ID,
+      text,
+    });
+    t.ok(!opts.servedFromCache, `successfully synthesized eleven 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);
+
+  if (!process.env.OPENAI_API_KEY) {
+    t.pass('skipping OPENAI speech synth tests since OPENAI_API_KEY not provided');
+    return t.end();
+  }
+  const text = 'Hi there and welcome to jambones!';
+  try {
+    let opts = await synthAudio(stats, {
+      vendor: 'whisper',
+      credentials: {
+        api_key: process.env.OPENAI_API_KEY,
+        model_id: 'tts-1'
+      },
+      language: 'en-US',
+      voice: 'alloy',
+      text,
+    });
+    t.ok(!opts.servedFromCache, `successfully synthesized whisper audio to ${opts.filePath}`);
+
+  } catch (err) {
+    console.error(JSON.stringify(err));
+    t.end(err);
+  }
+  client.quit();
+})
+
 test('TTS Cache tests', async(t) => {
   const fn = require('..');
   const {purgeTtsCache, getTtsSize, client} = fn(opts, logger);