remove everything related to rover mic while keeping tts

pi/roverd/config.go

@@ -141,7 +141,7 @@ func LoadConfig(path string) (*Config, error) {
 			NudgeDegrees: 2,
 		},
 		Audio: AudioConfig{
-			CaptureEnabled: true,
+			CaptureEnabled: false,
 			CaptureDevice:  "plughw:0,0",
 			SampleRate:     48000,
 			Channels:       1,

pi/roverd/media_env.go

@@ -25,11 +25,8 @@ func UpdatePublisherEnv(media MediaConfig, audio AudioConfig) error {
 	fmt.Fprintf(&buf, "VIDEO_HEIGHT=%d\n", media.VideoHeight)
 	fmt.Fprintf(&buf, "VIDEO_FPS=%d\n", media.VideoFPS)
 	fmt.Fprintf(&buf, "VIDEO_BITRATE=%d\n", media.VideoBitrate)
-	fmt.Fprintf(&buf, "AUDIO_ENABLE=%d\n", boolToInt(audio.CaptureEnabled))
-	fmt.Fprintf(&buf, "AUDIO_DEVICE=%s\n", audio.CaptureDevice)
-	fmt.Fprintf(&buf, "AUDIO_RATE=%d\n", audio.SampleRate)
-	fmt.Fprintf(&buf, "AUDIO_CHANNELS=%d\n", audio.Channels)
-	fmt.Fprintf(&buf, "AUDIO_BITRATE=%d\n", audio.Bitrate)
+	// Disable mic streaming; audio is handled locally for TTS only.
+	fmt.Fprintf(&buf, "AUDIO_ENABLE=0\n")
 	if err := os.WriteFile(publisherEnvPath, buf.Bytes(), 0o640); err != nil {
 		return err
 	}

pi/roverd/roverd.sample.yaml

@@ -38,7 +38,7 @@ cameraServo:
   nudgeDegrees: 2
   allowRawPulse: false
 audio:
-  captureEnabled: true
+  captureEnabled: false
   captureDevice: plughw:0,0
   sampleRate: 48000
   channels: 1