Looping and changing Pan settings.

[ChadAlro]

So I'm working on a program to play background music and sounds for a display that will automatically change based on Time of Day. To pull this off it needs to loop an MP3 until the next trigger time hits and then it starts looping the next track in the list.

I would also like to be able to adjust the Balance as the loop is playing as there are times when you want a track to just come out of a specific channel do to prop placement, etc.

I can get the Looping to work, or I can get the balance to change in real time, but I can't seem to do both.

This will let me alter the left and right volume in real time, but won't loop of course:

         Mp3File = new AudioFileReader(@"C:\Sounds\wolf-howl-6310.mp3"); 
         outputDevice = new WaveOutEvent();


        Volume = new VolumeStereoSampleProvider(Mp3File);
        Volume.VolumeLeft = 0f;
        Volume.VolumeRight = 1f;

        outputDevice.Init(Volume);
        outputDevice.Play();

This code adds the looping but once I do this altering the left and right volume settings has no effect:

        Mp3File = new AudioFileReader(@"C:\Users\cpenney\Documents\Sounds\wolf-howl-6310.mp3"); 
            outputDevice = new WaveOutEvent();
        Volume = new VolumeStereoSampleProvider(Mp3File);
        Volume.VolumeLeft = 0f;
        Volume.VolumeRight = 1f;


        waveProvider = Volume.ToWaveProvider();
        memoryStream = new MemoryStream();
       WaveFileWriter.WriteWavFileToStream(memoryStream, waveProvider);
       memoryStream.Position = 0; // Important for WaveFileReader to be able to read the header chunk bytes
       waveReader = new WaveFileReader(memoryStream);

       loop = new LoopStream(waveReader);
       loop.EnableLooping = true;

        outputDevice.Init(loop);
        outputDevice.Play();

How would I go about making looping work and be able to change the balance at that same time???

[markheath]

You need a signal chain like this:
WaveFileReader -> LoopStream -> VolumeStereoSampleProvider

Here's some example code

var mp3 = new AudioFileReader(@"C:\Sounds\wolf-howl-6310.mp3"); 
var loop = new LoopStream(mp3);
loop.EnableLooping = true;
volume = new VolumeStereoSampleProvider(loop.ToSampleProvider());
volume.VolumeLeft = 0f;
volume.VolumeRight = 1f;
outputDevice.Init(volume);
outputDevice.Play();