wasapi_barebones

A blank Unity project with the plugin for CS Core audio library and WASAPI

Features

Spectral Analysis (FFT of audio waveform)
Time Averaging/Smoothing
Beat Mapping per frequency
Audio Buffer

Creating a 2D Texture from the Audio Buffer

    public LoopbackAudio Audio;
    public int bufferSmooth = 0;
    public Gradient gradient; 
    Texture2D texture;

    
    public Texture2D CreateTexture(float[,] data, int width, int height)
    {
        texture = new Texture2D(height, width, TextureFormat.ARGB32, false);
        texture.filterMode = FilterMode.Point;

        for (int i = 0; i < height; i++)
        {
            for (int j = 0; j < width; j++)
            {
                    texture.SetPixel(width - 1 - j, height - 1 - i, gradient.Evaluate(data[i,j]/10f));
            }
        }
        texture.Apply();
        return texture;
    }

Call the function like such

float[,] data = new float[Audio.audioQueue.Count, Audio.SpectrumSize];
data = Audio.getBuffer(bufferSmooth);
visualEffect.SetTexture("AudioTexture", CreateTexture(data, Audio.audioQueue.Count, Audio.SpectrumSize)  );

The audio buffer will automatically save data from the WeightedPostScaledSpectrum, which is the time averaged spectrum. The bufferSmooth parameter will smooth data in time before returning it. This will round out sharp peaks in the spectrogram

smaerdlatigid / Unity-WASAPI

wasapi_barebones

Creating a 2D Texture from the Audio Buffer

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