Rec on: each key you press fills the highlighted step and moves on; Rest leaves a step silent. Click a step to move the cursor there. Space plays and stops.
Keys: A W S E D F T G Y H U J play C…B, Z/X octave, ,/. previous / next set, N/M previous / next sound. A MIDI keyboard plays the chord of each note's key when the browser allows Web MIDI. The chord sets follow the chord names and voicings published in the Roland J-6 owner's manual; the sound engine, sequencer and code are this project's own (GPL-3.0). Not affiliated with or endorsed by Roland. "Roland", "AIRA" and "J-6" are trademarks of Roland Corporation.