[bug] Audio Visualizer doesn't work for unpublished local audio tracks

[bdlukaa]

Describe the bug

When using the audio visualizer in a local audio track before joining, in a pre join screen, the audio visualizer doesn't work for the specified track.

To Reproduce

final devices = await Hardware.instance.enumerateDevices();
final track = LocalAudioTrack.create(
  AudioCaptureOptions(
    deviceId: devices
                   .firstWhereOrNull((d) => d.kind == 'audioinput')
                   ?.deviceId,
    ),
);
await track.start();

...

SoundWaveformWidget(
  audioTrack: audioTrack,
)

Expected behavior

The audio visualizer should work normally.

Platform information

• Flutter version:
  [✓] Flutter (Channel stable, 3.41.4, on macOS 26.3.1 25D771280a darwin-arm64, locale pt-BR) [414ms]
  • Flutter version 3.41.4 on channel stable at /Users/bdlukaa/Documents/flutter
  • Upstream repository https://github.com/flutter/flutter.git
  • Framework revision ff37bef603 (4 weeks ago), 2026-03-03 16:03:22 -0800
  • Engine revision e4b8dca3f1
  • Dart version 3.11.1
  • DevTools version 2.54.1
• Plugin version: 2.7.0
• Flutter target OS: Android, iOS

[hiroshihorie]

Hello, thanks for the report, I think something like this will fix the issue, can you try it ?
#1045

[bdlukaa]

The fix is working! Thanks :)