Looking to get back into some home recording, and I have been checking out USB Audio Interfaces (Line6 Tone Studio, M-Audio MTrack, Scarlett 2i2, etc) This is going to be for some REALLY basic stuff. Like, playing my bass over some drum loops or maybe a bass and guitar, using ACID or the overdub feature in Audacity. Mostly to get ideas down "on paper". My question is whether a small format mixer would be helpful or necessary in this situation. I have an XLR out on my amp, as well as an M-80 DI, so would adding in a small mixer (like a Xenyx) even be worthwhile or should I go directly to the audio interface and then use that and the software to tweak things? Just curious if adding another piece of hardware into the change would help or just complicate and possibly hurt the sound. I know most of the cheap mixers only do stereo rather than the multiple discrete channels that the more pricey models are capable of. Thanks!