How would you record a cassette from a tape player with an Mbox 2?
Hook up the outputs of the tape player into the line inputs of the Mbox.
I did that but there was just a loud humming.
Then something was not hooked up right.
Or you have a ground loop. What cassette deck are you using? How are you connecting it, specifically?
Which jack should I put it into, DI or line (TRS)?
"Hook up the outputs of the tape player into the line inputs of the Mbox."
Whats a cassette! D: (kidding) Nick