Even though this is a sound problem I'm not not sure it's because of my sound cards. I get a constant rhythmic clicking sound (around 100bpm I'd say) when the volume is turned up fairly high. The clicking is a lot like the sound my sound system makes when it is turned on but unplugged from the PC, only quieter. The clicking disappears when I plug the sound system in something else, such as a DAT machine, so the problem isn't in my speakers or amp. The speakers only click when it is plugged in my computer. My sound card is an E-MU 1212M. The problem persists on my onboard sound card too. My cables aren't broken. I'm thinking this might be interference with some other hardware or maybe sync problems? I don't know how to fix this. This problem makes recording impossible. Any help is appreciated.