Legacy Documentation: Version 5.2
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Obsolete
GetSpectrumData returning a float[] is deprecated, use GetSpectrumData passing a pre allocated array instead.

AudioSource.GetSpectrumData

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public float[] GetSpectrumData(int numSamples, int channel, FFTWindow window);

Parameters

Description

Returns a block of the currently playing source's spectrum data.

Number of values (numSamples) must be a power of 2. (ie 128/256/512 etc). Min = 64. Max = 8192. Use window to reduce leakage between frequency bins/bands. Note, the more complex window type, the better the quality, but reduced speed.


public void GetSpectrumData(float[] samples, int channel, FFTWindow window);

Parameters

Description

Returns a block of the currently playing source's spectrum data.

Number of values (numSamples) must be a power of 2. (ie 128/256/512 etc). Min = 64. Max = 8192. Use window to reduce leakage between frequency bins/bands. Note, the more complex window type, the better the quality, but reduced speed.

	using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { AudioSource audio; void Start() { audio = GetComponent<AudioSource>(); } void Update() { float[] spectrum = audio.GetSpectrumData(1024, 0, FFTWindow.BlackmanHarris); int i = 1; while (i < 1023) { 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.yellow); i++; } } }