I'm looking for a looper pedal for live use in a guitar trio. My objective is to store chord progressions that I can recall and play live via footswitch when I play leads. Because the tempo of a song may vary from performance to performance, I will need the ability to tap in the playback tempo. My Jamman Solo provides a way to change the playback tempo, but that can only be done via the tempo button not the footswitch. Which looper pedal(s) will do this?