csharp GetSpectrumData.cs

Posted 2021-05-12

// https://docs.unity3d.com/ScriptReference/AudioSource.GetSpectrumData.html

void Update()
{
    float[] spectrum = new float[256]; // ie 128, 256, 512 etc
    
    AudioListener.GetSpectrumData(spectrum, 0, FFTWindow.Rectangular);

    for (int i = 1; i < spectrum.Length - 1; i++)
    {
        Debug.DrawLine(new Vector3(i - 1, spectrum[i] + 10, 0), new Vector3(i, spectrum[i + 1] + 10, 0), Color.red);
        Debug.DrawLine(new Vector3(i - 1, Mathf.Log(spectrum[i - 1]) + 10, 2), new Vector3(i, Mathf.Log(spectrum[i]) + 10, 2), Color.cyan);
        Debug.DrawLine(new Vector3(Mathf.Log(i - 1), spectrum[i - 1] - 10, 1), new Vector3(Mathf.Log(i), spectrum[i] - 10, 1), Color.green);
        Debug.DrawLine(new Vector3(Mathf.Log(i - 1), Mathf.Log(spectrum[i - 1]), 3), new Vector3(Mathf.Log(i), Mathf.Log(spectrum[i]), 3), Color.blue);
    }
}