956 ribbon

moog956 · utility · schema v1

956 Ribbon Controller (moogafakkin System 55 clone — categorized under Ports -> moogafakkin). A horizontal touch-ribbon: press and slide along the strip and the position maps to a continuous pitch CV, with a GATE that goes HIGH while touched. Outputs pitch (V/oct: 1.0 = one octave, a semitone = 1/12, matching MIDI CV BUDDY) and gate. Like the hardware resistive ribbon, lifting off HOLDS the last pitch — only the gate falls, so the patched VCO stays at the last played note. SCALE sets the ribbon span in octaves (0..5, default 2); OFFSET shifts the base pitch in octaves (-2..2). A UI-driven CV source in the JOYSTICK / GAMEPAD family — the card pointer drives two ConstantSourceNodes; no audio worklet. Beige moogafakkin faceplate. The on-screen keyboards (950/951/952) are intentionally NOT cloned — route hardware MIDI keys through MIDI CV BUDDY instead.

A clean-room recreation of the Moog 956 Ribbon Controller — a touch strip you play with your finger. Slide along the horizontal ribbon and your finger position maps to a continuous 1V/oct pitch CV; a gate goes HIGH the whole time you are touching it and falls when you lift off. Like the hardware's resistive ribbon, lifting off does NOT reset the pitch — the ribbon HOLDS its last value (only the gate drops), so the patched VCO stays on the last note until you touch again. The ribbon spans SCALE octaves end-to-end, shifted by OFFSET, so pitch (V/oct) = OFFSET + position × SCALE. Mental model: a fretless, glide-friendly keyboard alternative in the same family as joystick/gamepad — drive a VCO's pitch with the pitch output and an envelope/VCA with the gate.

the faceplate

0 inputs · 2 outputs · 4 params

about this module

Hover a control, or open the patch panel and hover a jack.

outputs

id	cable	what it does
`pitch`	pitch	1V/oct pitch CV set by your finger position along the ribbon: OFFSET at the far left up to OFFSET + SCALE at the far right. It HOLDS its last value after you lift off (no reset), so patch it into a VCO's 1V/oct pitch for smooth ribbon glides. V/oct pitch CV
`gate`	gate	Gate that stays HIGH (1.0) the entire time you are touching the ribbon and drops to 0 when you lift off — a hold-while-pressed gate. Patch it into an ADSR's gate or a VCA so a note sounds only while your finger is down. gate / trigger

params

id	label	range	default	curve
`pos`	Pos	0..1	0	linear
`gate`	Gate	0..1	0	linear
`scale`	Scale	0..5	2	linear
`offset`	Offset	-2..2	0	linear

controls

control	what it does
Gate	The touch state (0/1), written by the ribbon on press/release; it is the same signal carried by the gate output. Normally you play it by touching, not by editing.
Offset	The base pitch in octaves (V/oct), -2 to +2, that shifts the whole ribbon up or down so its span sits where you want on the keyboard.
Pos	The ribbon position itself (0..1), normally written by dragging on the strip; it persists with the patch so the last-played position survives a reload. You can also see/set it as a value.
Scale	How many octaves the ribbon spans end-to-end, 0 to 5 (default 2 = a two-octave strip). Larger = wider pitch range but coarser finger resolution.

source

moog956.ts on GitHub.