Some of the sounds, like organish pad, just sound weird. Some of the sounds, even, just play a little beep of what I think they're supposed to be. Some of the sounds that used to play either sound weird or don't play at all.
 
Multiple sounds have a high-pitched screech to them that doesn't change by pitch. It doesn't sound like whatever the sound's supposed to be, and it's getting really annoying. I'm using ACID Music Studio 7.0 as my music producer. I am also using an M-Audio KeyRig 49 (which shouldn't matter, because the sounds play the same through ACID).
 
Please help.

sounds like yoiu have a rubbish soundcard.. if your only using the onboard one, time to upgrade to a decent one.. and if you have a decent sound card, well it's obv. not setup right

as z3ta is a very full /wide sounding synth

key rig is only a midi controller right ? so you need an asio based soundcard as well

I have a Realtek HD Audio sound card.

Any help?