app/(tabs)/chat.tsx

@@ -45,7 +45,6 @@ import {
 import { ConnectionState, Track } from 'livekit-client';
 import { getToken, type BeneficiaryData } from '@/services/livekitService';
 import { useAuth } from '@/contexts/AuthContext';
-import { getAvailableAudioOutputs, selectAudioOutput, setAudioOutput } from '@/utils/audioSession';
 
 // Register LiveKit globals (must be called before using LiveKit)
 registerGlobals();
@@ -613,40 +612,6 @@ export default function ChatScreen() {
     endVoiceCallContext();
   }, [endVoiceCallContext, callState.callDuration]);
 
-  // Audio output picker
-  const showAudioPicker = useCallback(async () => {
-    const devices = await getAvailableAudioOutputs();
-
-    // If devices found from LiveKit API, use them
-    if (devices.length > 0) {
-      const buttons: any[] = devices.map(device => ({
-        text: device.name,
-        onPress: () => selectAudioOutput(device.id),
-      }));
-      buttons.push({ text: 'Cancel', style: 'cancel' });
-      Alert.alert('Audio Output', 'Select audio device:', buttons);
-      return;
-    }
-
-    // Fallback for Android (and iOS if no devices found)
-    // Show simple Speaker/Earpiece toggle using setAudioOutput()
-    Alert.alert(
-      'Audio Output',
-      'Select audio output:',
-      [
-        {
-          text: '🔊 Speaker',
-          onPress: () => setAudioOutput(true),
-        },
-        {
-          text: '📱 Earpiece',
-          onPress: () => setAudioOutput(false),
-        },
-        { text: 'Cancel', style: 'cancel' },
-      ]
-    );
-  }, []);
-
   // Handle voice transcript entries - add to chat in real-time
   const handleVoiceTranscript = useCallback((role: 'user' | 'assistant', text: string) => {
     if (!text.trim()) return;
@@ -1060,15 +1025,6 @@ export default function ChatScreen() {
               </Text>
             </View>
           )}
-          {/* Audio output button - only during active call */}
-          {isCallActive && (
-            <TouchableOpacity
-              style={styles.audioButton}
-              onPress={showAudioPicker}
-            >
-              <Ionicons name="volume-high" size={20} color={AppColors.primary} />
-            </TouchableOpacity>
-          )}
 
           <TextInput
             style={styles.input}
@@ -1282,17 +1238,6 @@ const styles = StyleSheet.create({
     backgroundColor: AppColors.error,
     borderColor: AppColors.error,
   },
-  audioButton: {
-    width: 44,
-    height: 44,
-    borderRadius: 22,
-    backgroundColor: AppColors.surface,
-    justifyContent: 'center',
-    alignItems: 'center',
-    marginRight: Spacing.sm,
-    borderWidth: 1,
-    borderColor: AppColors.primary,
-  },
   callActiveIndicator: {
     width: '100%',
     height: '100%',

hooks/useLiveKitRoom.ts

@@ -435,19 +435,6 @@ export function useLiveKitRoom(options: UseLiveKitRoomOptions): UseLiveKitRoomRe
 
       logSuccess('Connected to room!');
 
-      // ========== CRITICAL: Start Audio Playback ==========
-      // This is REQUIRED for audio to play on iOS and Android!
-      // Without this call, remote audio tracks will NOT be heard.
-      logInfo('Starting audio playback (room.startAudio)...');
-      try {
-        await lkRoom.startAudio();
-        logSuccess(`Audio playback started! canPlaybackAudio: ${lkRoom.canPlaybackAudio}`);
-        setCanPlayAudio(lkRoom.canPlaybackAudio);
-      } catch (audioPlaybackErr: any) {
-        logError(`startAudio failed: ${audioPlaybackErr.message}`);
-        // Don't fail the whole call - audio might still work on some platforms
-      }
-
       // Check if connection was cancelled after connect
       if (isUnmountingRef.current || currentConnectionId !== connectionIdRef.current) {
         logWarn('Connection cancelled after room.connect()');

utils/audioSession.ts

@@ -8,15 +8,6 @@
 
 import { Platform } from 'react-native';
 
-/**
- * Represents an available audio output device
- */
-export interface AudioOutputDevice {
-  id: string;
-  name: string;
-  type: 'speaker' | 'earpiece' | 'bluetooth' | 'headphones' | 'unknown';
-}
-
 // AudioSession module - use 'any' to avoid complex typing issues with @livekit/react-native
 // The actual AudioSession from LiveKit has specific enum types that are hard to match statically
 let audioSessionModule: any = null;
@@ -102,42 +93,50 @@ export async function configureAudioForVoiceCall(): Promise<void> {
       }
     } else if (Platform.OS === 'android') {
       // Android-specific configuration - FORCE SPEAKER OUTPUT
-      // CRITICAL: Use 'inCommunication' mode + 'music' stream for speaker
-      // Many Android devices default to earpiece for voice calls
-      console.log('[AudioSession] Configuring Android audio for SPEAKER...');
+      // SOLUTION: Use 'inCommunication' for echo cancellation + forceHandleAudioRouting + explicit speaker selection
+      console.log('[AudioSession] Configuring Android audio for SPEAKER with echo cancellation...');
 
       await AudioSession.configureAudio({
         android: {
-          // Use inCommunication mode but with music stream for speaker
+          // Force speaker as preferred output
+          preferredOutputList: ['speaker'],
+          // CRITICAL: This flag forces audio routing even in communication mode
+          forceHandleAudioRouting: true,
           audioTypeOptions: {
             manageAudioFocus: true,
-            // inCommunication gives us more control over audio routing
+            // Use 'inCommunication' for echo cancellation (important for voice calls!)
             audioMode: 'inCommunication',
             audioFocusMode: 'gain',
-            // Use 'music' stream - goes to speaker by default!
-            audioStreamType: 'music',
-            audioAttributesUsageType: 'media',
-            audioAttributesContentType: 'music',
+            // Voice call stream type for proper routing
+            audioStreamType: 'voiceCall',
+            audioAttributesUsageType: 'voiceCommunication',
+            audioAttributesContentType: 'speech',
           },
-          // Force speaker as output
-          preferredOutputList: ['speaker'],
-          // Allow us to control audio routing
-          forceHandleAudioRouting: true,
         },
       });
 
       console.log('[AudioSession] Starting Android audio session...');
       await AudioSession.startAudioSession();
 
-      // After starting, explicitly set speaker output
-      console.log('[AudioSession] Forcing speaker output...');
+      // CRITICAL: Explicitly select speaker AFTER session starts
+      // This overrides the default earpiece routing of inCommunication mode
       try {
-        await AudioSession.showAudioRoutePicker?.();
-      } catch {
-        // showAudioRoutePicker may not be available, that's ok
+        console.log('[AudioSession] Explicitly selecting speaker output...');
+        await AudioSession.selectAudioOutput('speaker');
+        console.log('[AudioSession] Speaker output explicitly selected!');
+      } catch (speakerErr) {
+        console.warn('[AudioSession] selectAudioOutput failed, trying showAudioRoutePicker:', speakerErr);
+        // Fallback: try to show audio route picker or use alternative method
+        try {
+          if (AudioSession.showAudioRoutePicker) {
+            await AudioSession.showAudioRoutePicker();
+          }
+        } catch (pickerErr) {
+          console.warn('[AudioSession] showAudioRoutePicker also failed:', pickerErr);
+        }
       }
 
-      console.log('[AudioSession] Android speaker mode configured!');
+      console.log('[AudioSession] Android speaker mode with echo cancellation configured!');
     }
 
     console.log('[AudioSession] Configuration complete!');
@@ -211,22 +210,30 @@ export async function reconfigureAudioForPlayback(): Promise<void> {
       });
       console.log('[AudioSession] iOS reconfigured for speaker playback');
     } else if (Platform.OS === 'android') {
-      // Reconfigure Android audio to ensure speaker output
-      // Using inCommunication + music stream for reliable speaker routing
+      // Reconfigure Android - force speaker while keeping echo cancellation
       await AudioSession.configureAudio({
         android: {
-          audioTypeOptions: {
-            manageAudioFocus: true,
-            audioMode: 'inCommunication',
-            audioFocusMode: 'gain',
-            audioStreamType: 'music',
-            audioAttributesUsageType: 'media',
-            audioAttributesContentType: 'music',
-          },
           preferredOutputList: ['speaker'],
           forceHandleAudioRouting: true,
+          audioTypeOptions: {
+            manageAudioFocus: true,
+            audioMode: 'inCommunication',  // Keep for echo cancellation
+            audioFocusMode: 'gain',
+            audioStreamType: 'voiceCall',
+            audioAttributesUsageType: 'voiceCommunication',
+            audioAttributesContentType: 'speech',
+          },
         },
       });
+
+      // Explicitly select speaker output
+      try {
+        await AudioSession.selectAudioOutput('speaker');
+        console.log('[AudioSession] Android speaker explicitly selected');
+      } catch (err) {
+        console.warn('[AudioSession] selectAudioOutput failed in reconfigure:', err);
+      }
+
       console.log('[AudioSession] Android reconfigured for speaker playback');
     }
 
@@ -237,82 +244,6 @@ export async function reconfigureAudioForPlayback(): Promise<void> {
   }
 }
 
-/**
- * Switch audio output between speaker and earpiece (iOS + Android)
- *
- * @param useSpeaker - true for speaker, false for earpiece
- */
-/**
- * Get list of available audio output devices
- *
- * @returns Array of available audio output devices
- */
-export async function getAvailableAudioOutputs(): Promise<AudioOutputDevice[]> {
-  console.log(`[AudioSession] Getting available audio outputs on ${Platform.OS}...`);
-
-  try {
-    const AudioSession = await getAudioSession();
-    if (!AudioSession) {
-      console.error('[AudioSession] Failed to get AudioSession module');
-      return [];
-    }
-
-    const outputs = await AudioSession.getAudioOutputs();
-    console.log('[AudioSession] Available outputs:', outputs);
-
-    // Map the raw outputs to our AudioOutputDevice interface
-    if (Array.isArray(outputs)) {
-      return outputs.map((output: any) => ({
-        id: output.id || output.deviceId || String(output),
-        name: output.name || output.deviceName || String(output),
-        type: mapDeviceType(output.type || output.deviceType),
-      }));
-    }
-
-    return [];
-  } catch (error) {
-    console.error('[AudioSession] getAvailableAudioOutputs error:', error);
-    return [];
-  }
-}
-
-/**
- * Select a specific audio output device by ID
- *
- * @param deviceId - The ID of the device to select
- */
-export async function selectAudioOutput(deviceId: string): Promise<void> {
-  console.log(`[AudioSession] Selecting audio output: ${deviceId} on ${Platform.OS}...`);
-
-  try {
-    const AudioSession = await getAudioSession();
-    if (!AudioSession) {
-      console.error('[AudioSession] Failed to get AudioSession module');
-      return;
-    }
-
-    await AudioSession.selectAudioOutput(deviceId);
-    console.log(`[AudioSession] Audio output selected: ${deviceId}`);
-  } catch (error) {
-    console.error('[AudioSession] selectAudioOutput error:', error);
-  }
-}
-
-/**
- * Map raw device type to our AudioOutputDevice type
- */
-function mapDeviceType(rawType: string | undefined): AudioOutputDevice['type'] {
-  if (!rawType) return 'unknown';
-
-  const type = rawType.toLowerCase();
-  if (type.includes('speaker')) return 'speaker';
-  if (type.includes('earpiece') || type.includes('receiver')) return 'earpiece';
-  if (type.includes('bluetooth')) return 'bluetooth';
-  if (type.includes('headphone') || type.includes('headset') || type.includes('wired')) return 'headphones';
-
-  return 'unknown';
-}
-
 /**
  * Switch audio output between speaker and earpiece (iOS + Android)
  *
@@ -345,25 +276,29 @@ export async function setAudioOutput(useSpeaker: boolean): Promise<void> {
         },
       });
     } else if (Platform.OS === 'android') {
-      // Android: Switch stream type to control speaker/earpiece
-      // - 'music' stream goes to speaker by default
-      // - 'voiceCall' stream goes to earpiece by default
+      // Android: Keep inCommunication mode for echo cancellation, use explicit output selection
       await AudioSession.configureAudio({
         android: {
-          audioTypeOptions: {
-            manageAudioFocus: true,
-            audioMode: useSpeaker ? 'normal' : 'inCommunication',
-            audioFocusMode: 'gain',
-            // Key difference: music→speaker, voiceCall→earpiece
-            audioStreamType: useSpeaker ? 'music' : 'voiceCall',
-            audioAttributesUsageType: useSpeaker ? 'media' : 'voiceCommunication',
-            audioAttributesContentType: useSpeaker ? 'music' : 'speech',
-          },
-          // Also set preferred output list
           preferredOutputList: useSpeaker ? ['speaker'] : ['earpiece'],
           forceHandleAudioRouting: true,
+          audioTypeOptions: {
+            manageAudioFocus: true,
+            // Always use inCommunication for echo cancellation
+            audioMode: 'inCommunication',
+            audioFocusMode: 'gain',
+            audioStreamType: 'voiceCall',
+            audioAttributesUsageType: 'voiceCommunication',
+            audioAttributesContentType: 'speech',
+          },
         },
       });
+
+      // Explicitly select output device
+      try {
+        await AudioSession.selectAudioOutput(useSpeaker ? 'speaker' : 'earpiece');
+      } catch (err) {
+        console.warn('[AudioSession] selectAudioOutput failed:', err);
+      }
     }
 
     console.log(`[AudioSession] Audio output set to ${useSpeaker ? 'SPEAKER' : 'EARPIECE'}`);