Keep this tab in the foreground. Browsers throttle timers in background tabs, which will stall the sequencer.
Notes are scheduled ahead with precise timestamps, so short interface hitches will not shift the timing.
Drums
Click a step to edit it in the selected mode. Len sets the track's own step count — set different
lengths to get polymetric patterns that drift against each other.
Note and Ch set what each track sends.
Bass line
In pitch mode, click the upper half of a step to raise it and the lower half to lower it, within the scale.
Slide holds the previous note through this step so the synth glides — the classic 303 behaviour,
which needs a mono synth with portamento to be audible. The preview's Acid voice does it for you.
Preview sound
Synth
Vol80
Reverb18
Delay10
Level
Built-in synth for previewing without hardware, alongside MIDI out on the same timestamps. Pick a sound per track;
pitched sounds and toms follow the track's note. The bass's Acid voice is a mono 303-style line: slides glide
without retriggering the filter, accents open it wider.