Sound loop problem

Hi,
can anyone tell me how to loop 5 different sounds, drums, bass, sax etc.
When i use :
firstSound=new Sound();
firstSound.attachSound(“bubanj”);
firstSound.start(0,999);
secondSound=new Sound();
secondSound.attachSound(“bas”);…

and play them all, it’s ok, looping fine,
but what i want to do is to have 5 buttons that control those 5 sounds.
turning of and on some of them…

i tried with “secondSound.setVolume(0)” to turn off 2nd sound, but that kill them all…

CAN i SOMEHOW set volume down just for one sound?

OR if thats not possible, i need bass or sax sound to start again, when button is clicked, in the same position where drums sound is…
but when loop start again to start also from “0”

i’ve also tried reading firstsound position:

posdrums = firstSound.position/1000;
secondSound.start(posdrums,999);

than second sound start just where it need to, but loop again from that new start point!!