feat(HDAudio): Initial implementation.

config.js

     // Enables support for opus-red (redundancy for Opus).
     // enableOpusRed: false,
 
+    // Enables HD audio quality (but also disables echo cancellation, noise suppression and AGC).
+    // enableHdAudio: false,
+
     // Video
 
     // Sets the preferred resolution (height) for local video. Defaults to 720.

react/features/base/config/configWhitelist.js

     'e2eping',
     'enableDisplayNameInStats',
     'enableEmailInStats',
+    'enableHdAudio',
     'enableIceRestart',
     'enableInsecureRoomNameWarning',
     'enableLayerSuspension',

react/features/base/lib-jitsi-meet/actions.js

     return (dispatch: Dispatch<any>, getState: Function): void => {
         const state = getState();
         const config = state['features/base/config'];
+        const { enableHdAudio } = config;
 
         if (!config) {
             throw new Error('Cannot init lib-jitsi-meet without config');
         }
 
+        if (enableHdAudio) {
+            Object.assign(config, {
+                ...config,
+                channelCount: 2,
+                disableAP: true,
+                enableNoAudioDetection: false,
+                enableNoisyMicDetection: false,
+                enableTalkWhileMuted: false,
+                opusMaxAverageBitrate: 510000,
+                stereo: true
+            });
+        }
+
         dispatch({ type: LIB_WILL_INIT });
 
         try {