Funny how the $100 Art unit linked in this thread was called low-cost. This is a tool that will have many uses IMO.
Agreed, has many uses. That's why I'd suggest finding a sub $30 mixer on Craigs List.
Twice I have purchased the Behringer Xynex with 2 XLR and 2 1/4" inputs on Craigs List (both times for less than $30).
One I use on my desk for routing multiple audio sources into my desktop monitors.....and the other one my drummer uses to mix his IEMs and Sampler unit for his own mix.
Small channel mixers like that can be used for many 'small task' duties.
I prefer the Behringer to the ART because you at least have some Bass/Treble control.