[Android] Audio Recording volume suddenly drops after approximately 3 seconds

[azrinsani]

Package version
record: ^5.1.2

Environment

• OS: Android 13
• Google Pixel 4

Describe the bug

Audio Recording volume suddenly drop after recording is started for 3 seconds. So the recorded Audio will have a steady sound and suddenly a drop after about 3 seconds. This happens all the time on this device.

Future<void> startRecording() async { String fileName = '${UserConfig.current.recordedFileNamePrefix}_${DateTime.now().millisecondsSinceEpoch}.${MyRecorder.audioFileExtension}'; String audioFilePath = path.join(Utilities.tmpDir, fileName); await _audioRecorder.cancel(); monitoringStreamStarted = false; await _audioRecorder.start(const RecordConfig(encoder: AudioEncoder.wav), path: audioFilePath); }

I have also tried RecordConfig(encoder: AudioEncoder.wav, autoGain: true, androidConfig: AndroidRecordConfig(useLegacy: true)) and changing the encoder to AAC, yet the same problem occurs

Note: Other android recording apps on this phone works fine

To Reproduce

Steps to reproduce the behavior:

1. Create a new Recorder
2. Create a new RecordingConfig
3. Start recording with config
4. Stop recording
5. Try to listen to recorded file

Expected behavior

Recorded volume should be consistent

[renancaraujo]

Low volume on android is also a problem on my tests on two different devices (Samsung s21 ultra and Xperia 1 IV)

[Sesa1988]

Low volume on android is also a problem on my tests on two different devices (Samsung s21 ultra and Xperia 1 IV)

I also have this issue on S23+. My recording is low volume in general but it seems fine on Windows.

I do nothing special here:

await recorder.start(
          const RecordConfig(
            encoder: AudioEncoder.aacLc,
          ),
          path: fullfilePath);

There is a workaround with useLegacy: true on Android.

[llfbandit]

legacy uses default audio source. This is now the default source for both recorder implementations.
Also, source is now added to android config from 450db60 to mitigate constructor implementations.