fix deepgram and playht has white noise from begining of cache audio

fix rimelabs typo issue on getFileExtension function

lib/synth-audio.js

@@ -779,6 +779,9 @@ const synthPlayHT = async(client, logger, {
         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');
@@ -797,6 +800,7 @@ const synthPlayHT = async(client, logger, {
     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}`;

lib/utils.js

@@ -35,6 +35,7 @@ function makeFilePath({vendor, key, salt = '', renderForCaching = false}) {
 
 function getFileExtension({vendor, renderForCaching = false}) {
   const mp3Extension = 'mp3';
+  const wavExtension = 'wav';
   const r8Extension = 'r8';
 
   switch (vendor) {
@@ -45,15 +46,20 @@ function getFileExtension({vendor, renderForCaching = false}) {
       } else {
         return mp3Extension;
       }
-    case 'deepgram':
     case 'elevenlabs':
-    case 'rimlabs':
-    case 'playht':
+    case 'rimelabs':
       if (renderForCaching || JAMBONES_DISABLE_TTS_STREAMING) {
         return mp3Extension;
       } else {
         return r8Extension;
       }
+    case 'playht':
+    case 'deepgram':
+      if (renderForCaching || JAMBONES_DISABLE_TTS_STREAMING) {
+        return mp3Extension;
+      } else {
+        return wavExtension;
+      }
     case 'nuance':
     case 'nvidia':
     case 'verbio':

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@jambonz/speech-utils",
-  "version": "0.1.17",
+  "version": "0.1.20",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@jambonz/speech-utils",
-      "version": "0.1.17",
+      "version": "0.1.20",
       "license": "MIT",
       "dependencies": {
         "@aws-sdk/client-polly": "^3.496.0",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@jambonz/speech-utils",
-  "version": "0.1.17",
+  "version": "0.1.20",
   "description": "TTS-related speech utilities for jambonz",
   "main": "index.js",
   "author": "Dave Horton",