[mitien]

2 MIX-er - вот тебе простейший кодик

snd1 = new Sound();
snd2 = new Sound();
snd1.loadSound("e:\\test1.mp3",false);
snd1.setVolume(50);
snd1.start();
snd2.loadSound("e:\\test2.mp3",false);
snd2.setVolume(200);
snd2.start();