[tts] update the default voice to multilingual with auto language det…

…ection (#808)

Co-authored-by: Yulin Li <yulili@microsoft.com>

README.md

@@ -29,7 +29,7 @@ npm install microsoft-cognitiveservices-speech-sdk
 
 ## Building
 
-This source code for the Cognitive Services Speeck SDK (JavaScript) is available in a public [GitHub repository](https://github.com/Microsoft/cognitive-services-speech-sdk-js). You are not required to go through the build process. We create prebuilt packages tuned for your use-cases. These are updated in regular intervals.
+This source code for the Cognitive Services Speech SDK (JavaScript) is available in a public [GitHub repository](https://github.com/Microsoft/cognitive-services-speech-sdk-js). You are not required to go through the build process. We create prebuilt packages tuned for your use-cases. These are updated in regular intervals.
 
 In order to build the Speech SDK, ensure that you have [Git](https://git-scm.com/downloads) and [Node.js](https://nodejs.org/) installed. Version requirement for Node: 12.44.0 or higher (or 14.17.0 or higher for Node 14).
 
@@ -93,7 +93,7 @@ you want to run. For example, to only run tests defined in `AutoSourceLangDetect
     ```javascript
     import { Settings } from "../tests/Settings";
     Settings.SpeechSubscriptionKey = "0123456789abcdef0123456789abcdef";
-    Settings.SpeechRegion = "westcentralus"; 
+    Settings.SpeechRegion = "westcentralus";
     ```
     Then to run the tests type `RunTests.cmd` in the root of the repo.
 

src/sdk/Synthesizer.ts

@@ -129,7 +129,7 @@ export abstract class Synthesizer {
             ["en-PH"]: "en-PH-JamesNeural",
             ["en-SG"]: "en-SG-LunaNeural",
             ["en-TZ"]: "en-TZ-ElimuNeural",
-            ["en-US"]: "en-US-JennyNeural",
+            ["en-US"]: "en-US-AvaMultilingualNeural",
             ["en-ZA"]: "en-ZA-LeahNeural",
             ["es-AR"]: "es-AR-ElenaNeural",
             ["es-BO"]: "es-BO-MarceloNeural",

tests/Settings.ts

@@ -105,8 +105,8 @@ export class Settings {
     private static IsSettingsInitialized: boolean = false;
     public static SettingsClassLock: Settings;
 
-    public static CustomVoiceEndpointId: string = "6b231818-6b8c-4452-9a69-2009355d5d7a";
-    public static CustomVoiceVoiceName: string = "sdk-test";
+    public static CustomVoiceEndpointId: string = "8d4cf211-8602-40b7-833c-56a2f1060f89";
+    public static CustomVoiceVoiceName: string = "carbonTestNeural";
     public static testIfDOMCondition: jest.It = (typeof window === "undefined") ? test.skip : test;
     public static testIfNode: jest.It = (typeof window !== "undefined") ? test.skip : test;