use dsp to filter incoming audio in csharp

main.cs
using AudioProcessor;
using NAudio.Wave;

// Create a low-pass filter with a cutoff frequency of 1000 Hz
LowPassFilter filter = new LowPassFilter(1000, 44100, 1);

// Set up the WaveInEvent to capture audio from the default audio device
WaveInEvent waveIn = new WaveInEvent();
waveIn.DataAvailable += new EventHandler<WaveInEventArgs>(AudioReceived);
waveIn.StartRecording();

// This function is called every time new audio is received
private void AudioReceived(object sender, WaveInEventArgs e)
{
    // Convert the byte array to a float array
    float[] input = new float[e.BytesRecorded / 4];
    for (int i = 0; i < e.BytesRecorded / 4; i++)
        input[i] = BitConverter.ToSingle(e.Buffer, i * 4);

    // Filter the audio
    float[] output = filter.Process(input);

    // Convert the float array back to a byte array
    byte[] bytes = new byte[output.Length * 4];
    for (int i = 0; i < output.Length; i++)
        BitConverter.GetBytes(output[i]).CopyTo(bytes, i * 4);

    // Do something with the filtered audio
    // ...
}
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