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Reduce playback latency to improve playhead synchronization #2292

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Reduce playback latency to improve playhead synchronization #2292

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5 changes: 4 additions & 1 deletion OpenUtau/NAudioOutput.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ public class NAudioOutput : DummyAudioOutput { }
#else
public class NAudioOutput : IAudioOutput {
const int Channels = 2;
const int PlaybackLatencyMs = 50;

private readonly object lockObj = new object();
private WaveOutEvent? waveOutEvent;
Expand Down Expand Up @@ -84,7 +85,7 @@ public void Init(ISampleProvider sampleProvider) {
wasapiOut.Stop();
wasapiOut.Dispose();
}
wasapiOut = new WasapiOut(AudioClientShareMode.Shared, 200);
wasapiOut = new WasapiOut(AudioClientShareMode.Shared, PlaybackLatencyMs);
wasapiOut.PlaybackStopped += OnWasapiPlaybackStopped;
wasapiOut.Init(sampleProvider);
} else {
Expand All @@ -94,6 +95,8 @@ public void Init(ISampleProvider sampleProvider) {
}
waveOutEvent = new WaveOutEvent() {
DeviceNumber = deviceNumber,
DesiredLatency = PlaybackLatencyMs,
NumberOfBuffers = 2,
};
waveOutEvent.Init(sampleProvider);
}
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