flutter/lib/audio/browser_voice_meter_stub.dart

class VoiceMeterFrame {
  const VoiceMeterFrame({required this.level, required this.samples});

  final double level;
  final List<double> samples;
}

class BrowserVoiceMeter {
  bool get isSupported => false;

  Future<void> start(void Function(VoiceMeterFrame frame) onFrame) async {}

  Future<void> stop() async {}

  void dispose() {}
}