AudioClip.isReadyToPlay
var isReadyToPlay: bool;
Description

Is a streamed audio clip ready to play? (Read Only)

If the AudioClip is downloading from a web site, this returns if enough data has been downloaded so playback should be able to start without interruptions. For AudioClips not associated with a web stream, this value always returns true.
	function Start () {
		var www : WWW = new WWW("www.example.com");
		audio.clip = www.audioClip;
	}

function Update () { if(!audio.isPlaying && audio.clip.isReadyToPlay) audio.Play(); }