Hi, I am looking for some advice. I frequently need to rehearse by playing along with tracks posted on Youtube. What I have been doing is running the recorded track out of the headphone jack on the computer into the tape-in on a small Mackie mixer. Then I run my bass into a channel on the mixer and blend the two together through headphones. I'd like to be able to do this using hardware with a smaller footprint and fewer cords. Is there a better solution, like a tiny USB powered mixer? Thanks!