Bad Bass Sound, Playback sounds weird Options

[Hugo Cole]

Hi

I've been noticing that when I record real bass parts through my Firebox into Garageband on my G5, despite sounding fine monitored through my headphones, when I play it back there's a weird and unpleasant effect that sounds vaguely like there are two basses playing, and slightly out of tune with each other. Basically totally crappy sound. It seems to happen even when I try different effects (e.g. modern rock bass, edgy bass, etc). So I just tried playing my bass through input 1 on the firebox and it sounds much better. I also tried singing through input #2 and although nothing as bad as with the bass, the sound seems somewhat weaker (?). Any ideas what the problem might be?

Thanks

Ken