C# NAudio - Changing audio playback position still plays a small buffer of old position

Question

I am trying to make a basic MP3 player in C# and WPF, along with NAudio. I recently added a slider that tracks the current position in the song as well as allows you to drag it to a different position and upon Thumb.DragCompleted it will set the song's position to where you dragged it.

This all works fine and all, except when I make it jump to the new position, it still plays the old position 1/5th or so of a second before changing. This is most noticeable e.g. while the singer is in the middle of singing "aaa", you pause, drag to a point where he sings "ooo", then play again, you will hear "aa-ooo". This just results in it sounding pretty horrible.

So I suppose the audio playback simply has a small 'buffer' remaining that it insists on playing before moving on. Is there any way to clear this buffer? Or am I setting the position wrong?

I am using a WaveOut waveOutDevice and an AudioFileReader audioFileReader. The slider is called sldrPlaybackProgress.
I tried to change position in the song in two different ways already:

First method:

audioFileReader.CurrentTime = new TimeSpan(0, (int)(Math.Floor(sldrPlaybackProgress.Value / 60)), (int)(Math.Floor(sldrPlaybackProgress.Value % 60))); 

Second method:

audioFileReader.Position = (long)(sldrPlaybackProgress.Value * audioFileReader.WaveFormat.AverageBytesPerSecond);

Both of these individually or even both combined still result in the problem persisting.

Answer 1

You should call Stop when a reposition happens during pause. This will flush any outstanding buffers and. Under the hood Stop calls waveOutStop and Pause calls waveOutPause, which doesn't clear any in progress playing buffers.