How to mix audio tracks in Unity3D

Questions & Answers
1

Hi all,
My current project requires the mixing of multiple audio tracks of a song into one song at run time. I’m trying to figure out if Unity is a viable option for me.

I’m new to Unity and I’m worried that the nature of the engine won’t allow me to access the audio at a low enough level to ensure that the tracks remain in sync during run time.

So my question is: is it possible to mix tracks and keep them synced in Unity? and if so, could you point me in the right direction to go about it?

Thanks, Aaron

2

Hello,

As it has been said, you have direct access to low level data.
See : AudioClip.GetData(float[] data , 0 ) to retreive your data from an AudioClip, you can then separate the different channels

exemple if you have 3 channels :

data[0] fist sample of channel 1

data[1] fist sample of channel 2

data[2] fist sample of channel 3

_

data[3] second sample of channel 1

data[4] second sample of channel 2

data[5] second sample of channel 3

…

You can do any operations you want on those samples then send them back in a clip or directly to the unity Audio buffer.

see:

AudioClip.SetData
and
OnAudioFilterRead