GetAudioBytes.cs

    public override bool GetAudioBytes(int streamId, int bufferSize, out byte[] bytes, out int receivedBytes)
    {
        //Debug.Log("Get coherent audio data. Bytes = " + bufferSize);
        
        IntPtr audioBuffer = Marshal.AllocHGlobal(bufferSize);

        // When you need more data to play for stream #streamID
        //int timeout = 0; // A zero timeout means block until data is received
        receivedBytes = m_View.GetAudioData(streamId, audioBuffer, bufferSize, 0);
        if (receivedBytes <= 0)
        {
            // Negative values indicate an error; Zero is a valid return value if no data is present
            Marshal.FreeHGlobal(audioBuffer);
            bytes = new byte[0];
            return false;
        }

        // Get a byte pointer from the unmanaged memory block. 
        byte* audioBufferBytePtr = (byte*)audioBuffer.ToPointer();
        UnmanagedMemoryStream readStream = new UnmanagedMemoryStream(audioBufferBytePtr, receivedBytes, bufferSize, FileAccess.Read);
        // Create a byte array to hold data from unmanaged memory. 
        bytes = new byte[receivedBytes];

        // Read from unmanaged memory to the byte array.
        readStream.Read(bytes, 0, receivedBytes);
        readStream.Close();
        Marshal.FreeHGlobal(audioBuffer);

        // You now have your data in *managedData*

        return true;
    }