Audio Modes

Control audio output routing during calls. Switch between speaker, earpiece, Bluetooth, and wired headphones based on user preference or device availability.

Available Audio Modes

Mode	Description
.speaker	Routes audio through the device loudspeaker
.earpiece	Routes audio through the phone earpiece (for private calls)
.bluetooth	Routes audio through a connected Bluetooth device
.headphones	Routes audio through wired headphones

Set Initial Audio Mode

Configure the audio mode when joining a session:

Swift

let sessionSettings = CometChatCalls.sessionSettingsBuilder
    .setAudioMode(.speaker)
    .build()

CometChatCalls.joinSession(
    sessionID: sessionId,
    callSetting: sessionSettings,
    container: callViewContainer,
    onSuccess: { message in
        print("Joined with speaker mode")
    },
    onError: { error in
        print("Failed: \(error?.errorDescription ?? "")")
    }
)

Objective-C

SessionSettings *sessionSettings = [[[CometChatCalls sessionSettingsBuilder]
    setAudioMode:AudioModeTypeSpeaker]
    build];

[CometChatCalls joinSessionWithSessionID:sessionId
                             callSetting:sessionSettings
                               container:self.callViewContainer
                               onSuccess:^(NSString * message) {
    NSLog(@"Joined with speaker mode");
} onError:^(CometChatCallException * error) {
    NSLog(@"Failed: %@", error.errorDescription);
}];

Change Audio Mode During Call

Switch audio modes dynamically during an active call:

Swift

// Switch to speaker
CallSession.shared.setAudioMode("SPEAKER")

// Switch to earpiece
CallSession.shared.setAudioMode("EARPIECE")

// Switch to Bluetooth
CallSession.shared.setAudioMode("BLUETOOTH")

// Switch to wired headphones
CallSession.shared.setAudioMode("HEADPHONES")

Objective-C

// Switch to speaker
[[CallSession shared] setAudioMode:@"SPEAKER"];

// Switch to earpiece
[[CallSession shared] setAudioMode:@"EARPIECE"];

// Switch to Bluetooth
[[CallSession shared] setAudioMode:@"BLUETOOTH"];

// Switch to wired headphones
[[CallSession shared] setAudioMode:@"HEADPHONES"];

Listen for Audio Mode Changes

Monitor audio mode changes using MediaEventsListener:

Swift

class CallViewController: UIViewController, MediaEventsListener {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        CallSession.shared.addMediaEventsListener(self)
    }
    
    deinit {
        CallSession.shared.removeMediaEventsListener(self)
    }
    
    func onAudioModeChanged(audioModeType: AudioModeType) {
        switch audioModeType {
        case .speaker:
            print("Switched to speaker")
        case .earpiece:
            print("Switched to earpiece")
        case .bluetooth:
            print("Switched to Bluetooth")
        case .headphones:
            print("Switched to headphones")
        default:
            break
        }
        // Update audio mode button icon
        updateAudioModeIcon(audioModeType)
    }

    // Other callbacks...
    func onAudioMuted() {}
    func onAudioUnMuted() {}
    func onVideoPaused() {}
    func onVideoResumed() {}
    func onRecordingStarted() {}
    func onRecordingStopped() {}
    func onScreenShareStarted() {}
    func onScreenShareStopped() {}
    func onCameraFacingChanged(cameraFacing: CameraFacing) {}
}

Objective-C

@interface CallViewController () <MediaEventsListener>
@end

@implementation CallViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [[CallSession shared] addMediaEventsListener:self];
}

- (void)dealloc {
    [[CallSession shared] removeMediaEventsListener:self];
}

- (void)onAudioModeChangedWithAudioModeType:(AudioModeType)audioModeType {
    // Update audio mode button icon
    [self updateAudioModeIcon:audioModeType];
}

// Other callbacks...

@end

Hide Audio Mode Button

To prevent users from changing the audio mode, hide the button in the call UI:

Swift

let sessionSettings = CometChatCalls.sessionSettingsBuilder
    .setAudioMode(.speaker)      // Fixed audio mode
    .hideAudioModeButton(true)   // Hide toggle button
    .build()

Objective-C

SessionSettings *sessionSettings = [[[[CometChatCalls sessionSettingsBuilder]
    setAudioMode:AudioModeTypeSpeaker]
    hideAudioModeButton:YES]
    build];

The SDK automatically detects connected audio devices. If Bluetooth or wired headphones are connected, they become available as audio mode options.