Whilst playing CS source on my macbook (through crossover), when using voice chat, I (or so I have reliably been informed) experience horrendous quality. Not only this, but it lags (the game runs fine at ~30-40 fps) for about 5 seconds before any speech comes through. In mic settings, I can't change the volume slider (it resets to full whenever I leave it), and the mic itself is fine (I've checked in garageband etc). Would a headset improve the situation? Any help would be much appreciated.