My M-Audio Firewire Solo card seems to be the cause of an unavoidable consistant feedback. I am running 1/4" plugs from my turntables through my mackie then into the M audio solo. The M Audio card is connected to my laptop through a firewire 800 cable. Im confident its not from the source (turntables) because I have recorded from vinyl using these tables through other sound cards. I was curious if anyone else has had this problem with the M Audio solo card and any tips would be appreciated. Thanks. :?