How to play audio samples without writing it into to a file?

Question

I get audio samples (as float array) from another method and I want to play this float array without writing any files to disk.

For this example I get samples from audio file:

var file = new AudioFileReader(stereoFile);

int startPos = 0;
int endPos = 138890;

var sampleArray = new float[endPos - startPos];

file.Read(sampleArray, startPos, sampleArray.Length);

How can I play sampleArray?

Answer 1

I find next solution and it work for me:

        var file = new AudioFileReader(stereoFile);

        WaveFormat waveFormat = file.WaveFormat;

        int startPos = 2403;
        int endPos = 41265;

        if (startPos % 2 != 0)
        {
            startPos += 1;
        }

        if (endPos % 2 != 0)
        {
            endPos += 1;
        }

        if (waveFormat.Channels == 2)
        {
            startPos *= 2;
            endPos *= 2;
        }

        var allSamples = new float[file.Length / (file.WaveFormat.BitsPerSample / 8)];

        file.Read(allSamples, 0, allSamples.Length);

        Span<float> samplesSpan = allSamples;
        Span<float> trackSpan = samplesSpan.Slice(startPos, endPos - startPos);

^ upper code to take correct samples for tests. code below - my solution

        MemoryStream ms = new MemoryStream();
        IgnoreDisposeStream ids = new IgnoreDisposeStream(ms);

        using (WaveFileWriter waveFileWriter = new WaveFileWriter(ids, waveFormat))
        {
            waveFileWriter.WriteSamples(trackSpan.ToArray(), 0, endPos-startPos);
        }


        ms.Position = 0;
        WaveStream waveStream = new WaveFileReader(ms);
        WaveOutEvent waveOutEvent = new WaveOutEvent();
        waveOutEvent.Init(waveStream);
        waveOutEvent.Play();