View sound waves while recording audio in Flutter

Yes, there are packages available in Flutter that can help you to display sound waves while recording audio. One such package is the flutter_audio_recorder package, which provides an audio recorder widget that can be used to record audio and display the sound waves in real-time.

Here’s how you can use the flutter_audio_recorder package to display sound waves while recording audio in Flutter:

First, add the package to your pubspec.yaml file

dependencies:flutter_audio_recorder: ^0.6.0

dependencies:
  flutter_audio_recorder: ^0.6.0

Import the package in your Dart file:

import 'package:flutter_audio_recorder/flutter_audio_recorder.dart';

Create a FlutterAudioRecorder object to handle the audio recording:
```
FlutterAudioRecorder _audioRecorder;
```

Initialize the _audioRecorder object using the FlutterAudioRecorder() constructor:

_audioRecorder = FlutterAudioRecorder(
  "path/to/audio/file",
  audioFormat: AudioFormat.WAV,
);

Create a StreamSubscription object to listen to the audio recording events:
```
StreamSubscription _recorderSubscription;
```
Start recording audio using the _audioRecorder object:
```
await _audioRecorder.start();
```

Create a StreamBuilder widget to display the sound waves in real-time:

StreamBuilder<RecordingDisposition>(
  stream: _audioRecorder.onProgress,
  builder: (context, snapshot) {
    var level = 0.0;
    if (snapshot.hasData) {
      level = snapshot.data!.metering.brightness;
    }
    return CustomPaint(
      painter: SoundWavePainter(level),
    );
  },
);

Finally, stop recording audio using the _audioRecorder object when you are done:
```
await _audioRecorder.stop();
```
In the code above, the SoundWavePainter is a custom painter that can be used to draw the sound waves on the screen based on the sound level data. You can define this class based on your specific requirements.

I hope this helps you to display sound waves while recording audio in Flutter. Let me know if you have any further questions!