I have the Samson C01U microphone that connects through USB in the computer. I've never had any problems using it to record in GarageBand. When I try to use it to record in Logic Pro 8, I can't get it to work. I think that the first time I tried it I may have gotten it to work, but I'm not sure. I've tried following the instructions on Samson's page for this mic to work with Logic Pro 8 many times, and it isn't working. If anyone can help please reply.