i’ve been using a sony clear voice tape recorder (with various length loop tapes) in my rig for the past year or so. i love the way it can add texture, dimension, and a bit of unpredictability to a live set. i’ll often get a bunch of loops going on my other gear (ehx 22500 looper, op-1, modular), record the output of the speakers into the cassette recorder, and then layer the cassette recording loop underneath.
the playback speed control can be useful too for half speed, or more performative effects: