1

If I have an empty game object with two audio sources, each with a unique audio clip.

How, in script, do I pick one from the other? Let's say one audio source has a audio clip called jump.mp3 and the other has grunt.mp3

is it something like

var grunt : Audio Source; grunt = audio source with grunt.mp3

And then use grunt to talk to that one?

Or is there a way that a script attached to the game object with the two audio sources can directly talk to a chosen audio source without having to assign a variable?

3

You can define two different audio sources as public variables and bind them in editor. Just drag the component into the variable slot in the inspector. 

var audio1 : AudioSource; 
var audio2 : AudioSource;

When you then want to play either of those you can call

audio1.Play();
// or
audio2.Play();

Or if you want you can use GetComponents(AudioSource); to get an array of them, and you can enumerate through them. I think the first solution is easier though.

2

I think you do not have to use multiple AudioSources on one GameObject. From the reference for AudioSource: Multiple sounds can be played on one AudioSource using PlayOneShot.

You could assign your audio clip to a variable (or an array) and use for single events like shots etc.:

var grunt : Audio Source;
audio.PlayOneShot(grunt);

or if you want more control of the AudioClip:

audio.clip = grunt;
audio.Play();
4

Just a simple question: if I have two AudioSources, can they play together their two different audios ???

In code: if I write

audio1.Play();

audio2.Play();

can all of them play their sound, or only will play audio2 ???

Tnx !!