[Lasssa]

I have a synth (roland mc-303), and i want to make wav files with it.
Last time I tried, I plugged the synth straight in to my soundcard, but the samples where all noisy and I couldn't hear a damned shit.
So; How do I make wav files, WITHOUT getting the noise??
Anyone?...

I use a tracker to make music, therefor I need the wav files.