I almost never use any effects, but I'm reuniting with an old band after many years, and will need an envelope follower for a couple of tunes. The Doctor Q that I originally used (ca. 1979) has subsequently died. Now I'm thinking of buying something that can do that, plus octave doubling and chorus (simultaneously, at times). I'd like to spend around $100-150, new. (It doesn't have to sound good.) Any suggestions?