I feel like the obvious improvement to the Bitquest! Would presets and MIDI implementation. Then you can feasibly use more than just one effect live.
Also the modulation on the delay could be more useable, but i've figured out where the 5th and octave is on it and then it does become a very useable if quite specifc sound. The knobs are sooo touchy though I find it hard to recall precise settings.
Otherwise, what a damn fine pedal.
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I can write and record real drums for your music if you're into that.