AudioSource.spread

Description

Sets the spread angle (in degrees) of a 3d stereo or multichannel sound in speaker space.

0 = all sound channels are located at the same speaker location and is 'mono'. 360 = all subchannels are located at the opposite speaker location to the speaker location that it should be according to 3D position. Default = 0.

// when any AudioSource goes trough this transform, it will set it as 'mono'
// and will restore the value to 3D effect after exiting
// Make sure the audio source has a collider.
function OnTriggerEnter(other : Collider) {
    var audio = other.GetComponent.<AudioSource>();

    if(audio)
        audio.spread = 0;
}

function OnTriggerExit(other : Collider) {
    var audio = other.GetComponent.<AudioSource>();

    if(audio)
        audio.spread = 360;
}

no example available in C#