1 Reply
      Latest reply on Aug 19, 2019 1:26 PM by atheobald
      atheobald Level 1 Level 1 (0 points)

        I am unable to record Bluetooth using streaming audio (AudioQueues).


        I have a test "AVAudioRecorder" project where I successfully record voice using my Bluetooth microphone. Snippet follows:


        AVAudioRecorder* avRecorder;
        NSError* sessionError = nil;
        BOOL success = [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord withOptions:AVAudioSessionCategoryOptionAllowBluetooth | AVAudioSessionCategoryOptionAllowBluetoothA2DP error:&sessionError];
        if (success) {
            NSLog(@"The audio session category is set");
        } else {
            NSLog(@"The audio session category error is %@", sessionError.description);
        [snipped for brevity]
        // Start the audio session
        [[AVAudioSession sharedInstance] setActive:YES error:nil];
        [self.avRecorder prepareToRecord];
        [self.avRecorder record];



        Using the same AVAudioSession setup, when I replace AVAudioRecorder with my streaming audio recorder (AudioQueues) I get no input from my Bluetooth microphone. I know this because I stick my iPhone in the drawer and can barely hear the recording when I play it back.


        Apparently the iPhone is still using the built-in microphone instead of Bluetooth when streaming input.


        When I query the AVAudioSession object and look at AVAudioSessionPortDescriptions and AVAudioSessionDataSourceDescriptions it looks as if Bluetooth is available and set. But I feel as if I am missing something which I cannot quite pin down.


        Can anyone shed some light as to how to use a Bluetooth microphone with streaming audio input?