Edit individual samples in cscore

I'm trying to get at the individual 32bit samples using CScore. What I have so far is

    public MainWindow()
    {
        InitializeComponent();
        var wasapiCapture = new WasapiCapture();
        wasapiCapture.Initialize();
        wasapiCapture.Start();
        var wasapiCaptureSource = new SoundInSource(wasapiCapture);
        var stereoSource = wasapiCaptureSource.ToStereo();
        var ieeeFloatToSample = new IeeeFloatToSample(stereoSource);
        var sampleProvider = new SampleProvider(ieeeFloatToSample);
        var wavesource = sampleProvider.ToWaveSource();
        var wasapiOut = new WasapiOut();
        wasapiOut.Initialize(wavesource);
        wasapiOut.Play();
    }

And a class

class SampleProvider : ISampleSource
{
    private ISampleSource _source;
    public SampleProvider(ISampleSource source)
    {
        this._source = source;
    }

    public int Read(float[] buffer, int offset, int count)
    {
        var sampleRead = _source.Read(buffer, 0, count);
        return sampleRead;
    }

    public void Dispose()
    {
        throw new NotImplementedException();
    }
    public WaveFormat WaveFormat { get; private set; }
    public long Position { get; set; }
    public long Length { get; private set; }
}

Which I thought would pass the audio through unchanged but I am getting an error on the sampleProvider.ToWaveSource(); saying "Object reference not set to an instance of an object"

Any ideas? Thanks.

If you poke around through the CSCore source you'll find that ToWaveSource ends up cloning the WaveFormat of your SampleProvider - which you've left undefined. You can probably just return the WaveFormat from the upstream source:

public WaveFormat WaveFormat { get { return _source.WaveFormat; } }