How to find which audio source is playing

Hi Brian, thanks for getting back to me so quickly. Looking a little deeper - the item i drag into the audio visualiser is actually the game object - in this case the same game object as is used for the PlaylistController. So i think the script must just get the 'first' Audiosource from the GO, and not try and look for the second. So i probably need help in changing the script (even if its simple) so it grabs it from a varibale or global property like you have suggested.

This is the frist part of the script ... do you know what i can change to give the behaviour you've suggested?

using UnityEngine;

public class AudioPeer : MonoBehaviour {

public AudioSource audioSource;
public bool useBuffer = true;

private float[] samples = new float[512];
private float[] freqBands = new float[8];
private float[] freqBandBuffers = new float[8];
private float[] bufferDecrease = new float[8];

private float[] freqBandsHighest = new float[8];
private float[] audioBands = new float[8];
private float[] audioBandBuffers = new float[8];

void Update() {
if (audioSource == null) {
return;

Hey Brian,
Unfortuantly it didnt work - its not showing an error - but it doesnt react to the music

The full [original] script is below-

using UnityEngine;

public class AudioPeer : MonoBehaviour {

public AudioSource audioSource;
public bool useBuffer = true;

private float[] samples = new float[512];
private float[] freqBands = new float[8];
private float[] freqBandBuffers = new float[8];
private float[] bufferDecrease = new float[8];

private float[] freqBandsHighest = new float[8];
private float[] audioBands = new float[8];
private float[] audioBandBuffers = new float[8];

void Update() {
if (audioSource == null) {
return;
}
ReadSamples();
CalculateFrequencyBands();
if (useBuffer) {
BufferFrequencyBands();
}
CalculateAudioBands();
}

private void ReadSamples() {
audioSource.GetSpectrumData(samples, 0, FFTWindow.Blackman);
}
public void CalculateFrequencyBands() {
int totalSampleCount = 0;
for (int freqIndex = 0; freqIndex < freqBands.Length; freqIndex++) {
float average = 0;
int sampleCount = (int)Mathf.Pow(2, freqIndex) * 2;

if (freqIndex == 7) {
sampleCount += 2;
}
for (int sampleIndex = 0; sampleIndex < sampleCount; sampleIndex++) {
average += samples[totalSampleCount] * (totalSampleCount + 1);
totalSampleCount++;
}

average /= totalSampleCount;

freqBands[freqIndex] = average;
}
}

private void BufferFrequencyBands() {
for (int freqIndex = 0; freqIndex < freqBands.Length; freqIndex++) {
// New Maximum reached
if (freqBands[freqIndex] > freqBandBuffers[freqIndex]) {
freqBandBuffers[freqIndex] = freqBands[freqIndex];
bufferDecrease[freqIndex] = 0.005f;
} else if (freqBands[freqIndex] < freqBandBuffers[freqIndex]) {
freqBandBuffers[freqIndex] -= bufferDecrease[freqIndex];
bufferDecrease[freqIndex] *= 1.0f;
}
}
}

public void CalculateAudioBands() {
for (int freqIndex = 0; freqIndex < freqBands.Length; freqIndex++) {
if (freqBands[freqIndex] > freqBandsHighest[freqIndex]) {
freqBandsHighest[freqIndex] = freqBands[freqIndex];
}
audioBands[freqIndex] = freqBands[freqIndex] / freqBandsHighest[freqIndex];
audioBandBuffers[freqIndex] = freqBandBuffers[freqIndex] / freqBandsHighest[freqIndex];
}
}

public float GetSample(int sampleIndex) {
return samples[sampleIndex];
}
public float GetFrequencyBand(int freqIndex) {
return useBuffer ? freqBandBuffers[freqIndex] : freqBands[freqIndex];
}

// Normalized frequency band between 0 and 1
public float GetAudioBand(int freqIndex) {
return audioBands[freqIndex];
}

}

---------
I tried the following - based on what you advised...

using DarkTonic.MasterAudio;
using UnityEngine;

public class AudioPeer : MonoBehaviour {

public PlaylistController controller;
// public AudioSource audioSource;
public bool useBuffer = true;

private float[] samples = new float[512];
private float[] freqBands = new float[8];
private float[] freqBandBuffers = new float[8];
private float[] bufferDecrease = new float[8];

private float[] freqBandsHighest = new float[8];
private float[] audioBands = new float[8];
private float[] audioBandBuffers = new float[8];

void Update() {
// if (controller == null) {
// return;
// }

// var audioSrc = controller.ActiveAudioSource;

ReadSamples();
CalculateFrequencyBands();
if (useBuffer) {
BufferFrequencyBands();
}
CalculateAudioBands();
}

private void ReadSamples() {
var audioSrc = controller.ActiveAudioSource;
audioSrc.GetSpectrumData(samples, 0, FFTWindow.Blackman);
}
public void CalculateFrequencyBands() {
int totalSampleCount = 0;
for (int freqIndex = 0; freqIndex < freqBands.Length; freqIndex++) {
float average = 0;
int sampleCount = (int)Mathf.Pow(2, freqIndex) * 2;

if (freqIndex == 7) {
sampleCount += 2;
}
for (int sampleIndex = 0; sampleIndex < sampleCount; sampleIndex++) {
average += samples[totalSampleCount] * (totalSampleCount + 1);
totalSampleCount++;
}

average /= totalSampleCount;

freqBands[freqIndex] = average;
}
}

private void BufferFrequencyBands() {
for (int freqIndex = 0; freqIndex < freqBands.Length; freqIndex++) {
// New Maximum reached
if (freqBands[freqIndex] > freqBandBuffers[freqIndex]) {
freqBandBuffers[freqIndex] = freqBands[freqIndex];
bufferDecrease[freqIndex] = 0.005f;
} else if (freqBands[freqIndex] < freqBandBuffers[freqIndex]) {
freqBandBuffers[freqIndex] -= bufferDecrease[freqIndex];
bufferDecrease[freqIndex] *= 1.0f;
}
}
}

public void CalculateAudioBands() {
for (int freqIndex = 0; freqIndex < freqBands.Length; freqIndex++) {
if (freqBands[freqIndex] > freqBandsHighest[freqIndex]) {
freqBandsHighest[freqIndex] = freqBands[freqIndex];
}
audioBands[freqIndex] = freqBands[freqIndex] / freqBandsHighest[freqIndex];
audioBandBuffers[freqIndex] = freqBandBuffers[freqIndex] / freqBandsHighest[freqIndex];
}
}

public float GetSample(int sampleIndex) {
return samples[sampleIndex];
}
public float GetFrequencyBand(int freqIndex) {
return useBuffer ? freqBandBuffers[freqIndex] : freqBands[freqIndex];
}

// Normalized frequency band between 0 and 1
public float GetAudioBand(int freqIndex) {
return audioBands[freqIndex];
}

}


-----
any help would be really appriciated!

Thanks
J

Looking at the running code - i gets a error:

NullReferenceException: Object reference not set to an instance of an object.
AudioPeer.ReadSamples () - line 35 - which is the line i added

var audioSrc = controller.ActiveAudioSource;