[XtremeR]

pawn Код:

public OnPlayerRequestClass(playerid, classid)
{
PlayAudioStreamForPlayer(playerid, "http://www.fileden.com/files/2012/9/26/3351322/Hiphop%20Instrumentals%20-%20rap%20freestyle%20beats.mp3");//play it
    return 1;
}
public OnPlayerSpawn(playerid)
{
StopAudioStreamForPlayer(playerid);//stop it
    return 1;
}

i hope that helps