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fix(AI): Route audio to speaker instead of earpiece #7179

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fix(AI): Route audio to speaker instead of earpiece #7179

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5 changes: 4 additions & 1 deletion firebase-ai/src/main/kotlin/com/google/firebase/ai/type/AudioHelper.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -163,7 +163,10 @@ internal class AudioHelper(
fun build(): AudioHelper {
val playbackTrack =
AudioTrack(
AudioAttributes.Builder().setUsage(AudioAttributes.USAGE_VOICE_COMMUNICATION).build(),
AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_MEDIA)
.setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
Comment on lines +167 to +168
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medium

Consider making the content type configurable instead of hardcoding it to CONTENT_TYPE_SPEECH. While speech is the primary use case, the LiveSession handles generic audio data, and the generative model could potentially return other types of audio (e.g., sound effects). Using CONTENT_TYPE_UNKNOWN as the default might be a safer, more general-purpose choice.

          AudioAttributes.Builder()
            .setUsage(AudioAttributes.USAGE_MEDIA)
            //.setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
            .build(),

.build(),
AudioFormat.Builder()
.setSampleRate(24000)
.setChannelMask(AudioFormat.CHANNEL_OUT_MONO)
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