Loop Pedal
A clock-synced LOOP PEDAL you sing (or play) into: a live Microphone → a Looper → the Speaker, with a Clock driving the loop's bar grid (the metronome's on, so you have a click to play to). Drop it in (grant mic permission), press the Clock's Play, set the Looper's Bars, then flip Record on a downbeat — it captures exactly that many bars and loops them back in time, your live voice still passing through on top, so you build a part at a time. Use headphones to avoid monitor feedback (the mic's Mute also kills it). A FUNCTIONAL preset: explicit nodes + connections, so it's palette-only.