check for privAudio for SAD mute/volume API (#486)

* check for privAudio for SAD mute/volume API

* update url-parse, fix syntax issues from community PR

package.json

@@ -108,7 +108,7 @@
     "bent": "^7.3.12",
     "https-proxy-agent": "^4.0.0",
     "simple-lru-cache": "0.0.2",
-    "url-parse": "^1.5.6",
+    "url-parse": "^1.5.10",
     "uuid": "^8.3.0",
     "ws": "^7.5.6"
   },

src/common.speech/SpeechContext.ts

@@ -49,10 +49,10 @@ export class SpeechContext {
                 format: {}
             };
         }
-        if (this.privContext.phraseOutput.detailed === undefined) { 
+        if (this.privContext.phraseOutput.detailed === undefined) {
             this.privContext.phraseOutput.detailed = {
                 options: []
-            },
+            };
         }
         this.privContext.phraseOutput.format = "Detailed";
         this.privContext.phraseOutput.detailed.options.push("PronunciationAssessment");

src/sdk/Audio/SpeakerAudioDestination.ts

@@ -174,19 +174,25 @@ export class SpeakerAudioDestination implements IAudioDestination, IPlayer {
     }
 
     public get volume(): number {
-        return this.privAudio.volume;
+        return this.privAudio?.volume ?? -1;
     }
 
     public set volume(volume: number) {
-        this.privAudio.volume = volume;
+        if (!!this.privAudio) {
+            this.privAudio.volume = volume;
+        }
     }
 
     public mute(): void {
-        this.privAudio.muted = true;
+        if (!!this.privAudio) {
+            this.privAudio.muted = true;
+        }
     }
 
     public unmute(): void {
-        this.privAudio.muted = false;
+        if (!!this.privAudio) {
+            this.privAudio.muted = false;
+        }
     }
 
     public get isClosed(): boolean {