From 6d7e058cb0f2eedd5094db322ee32a1c000d37db Mon Sep 17 00:00:00 2001
From: Spirit <spirit@hobbs.farm>
Date: Tue, 10 Mar 2026 12:46:36 +0000
Subject: [PATCH] Fix TTS audio routing for Android Auto

Set AudioAttributes (USAGE_ASSISTANT) on the TTS engine itself,
not just on the AudioFocusRequest. Without this, TTS output goes
to the phone speaker instead of routing through Android Auto's
head unit.
---
 app/src/main/java/farm/hobbs/clippyauto/voice/TTSManager.kt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/app/src/main/java/farm/hobbs/clippyauto/voice/TTSManager.kt b/app/src/main/java/farm/hobbs/clippyauto/voice/TTSManager.kt
index a7264a6..03baeca 100644
--- a/app/src/main/java/farm/hobbs/clippyauto/voice/TTSManager.kt
+++ b/app/src/main/java/farm/hobbs/clippyauto/voice/TTSManager.kt
@@ -52,6 +52,8 @@ class TTSManager(
         tts = TextToSpeech(context) { status ->
             if (status == TextToSpeech.SUCCESS) {
                 tts?.language = Locale.US
+                // Route TTS audio through Android Auto head unit
+                tts?.setAudioAttributes(audioFocusRequest.audioAttributes)
                 tts?.setOnUtteranceProgressListener(object : UtteranceProgressListener() {
                     override fun onStart(utteranceId: String?) {
                         LatencyTracker.markT5() // t5: First audio frame