[Freeswitch-users] Async JS functions?

Hi, I have a small JS script that calls a phonenumber, when the call is answered it plays a wave file, then it calls a second phonenumber and bridges the calls. Is it possible to make wave-playing async, so that the second call is generated as soon as the first is picked up? Right now the wave file takes about 2 secs to play, but I need to extend that time, and I don't want to delay the second call. Thanks! Nicolas