midi lane

midiLane · sources · schema v1

MIDI LANE — a per-channel "instrument bus" demux for a hardware MIDI sequencer (Reliq, Cre8audio Programm, Empress ZOIA, or any class-compliant USB-MIDI device). DAW-style workflow: assign each track of your sequencer to its own MIDI channel, then drop one MIDI LANE per instrument and point each at that track's channel — multi-timbral = several lanes, like several MIDI-CV-BUDDYs but channel-aware and richer. Each lane demuxes its channel into the CV/gate the rack speaks: pitch_cv (V/oct, 0V = C4 = MIDI 60, pitch-bend summed at ±2 st), gate (HIGH while any key on the lane is held; with RETRIG, dips one audio block on each new note-on so a downstream ADSR re-fires), velocity_cv (0..1), plus TWO learn-assignable CC taps (cc_a / cc_b → 0..1 CV — hit LEARN, wiggle a CC, done; these subsume the per-track CC-modulation lane and can drive audio params OR video params via the cross-domain bridge), plus ONE by-note-number drum gate (note_gate fires on a card-selected MIDI note, default GM kick = 36 — the Programm/Reliq ch10 drum-router pattern generalized via configuration, not 8 fixed ports). MONO mode is monophonic with three voice-priority modes (LAST / LOW / HIGH); POLY mode adds a 10-channel polyPitchGate output (poly) so a chord on the lane plays a polyphonic synth (cartesian / dx7). The SAME outputs drive VIDEO modules for free: a gate or cv handle cabled into ACIDWARP.scene_cv / DOOM.cv_pN fires visuals with no synth voice — the engine's cross-domain CV/gate→video bridge needs no special "video gate" port. Uses the browser's built-in Web MIDI API (no third-party library, no native bridge); click "Connect MIDI…" once per origin to grant access. Main-thread plumbing (ConstantSource-per-output, 2 ms scheduling lookahead) identical to MIDI-CV-BUDDY, whose note logic it reuses verbatim. v1 surfaces a single-channel-or-ALL selector on the card (the engine supports a multi-channel Set under the hood for a future multi-select). End-to-end Web MIDI latency is the honest ~5-10 ms main-thread path.

A per-channel instrument bus that demuxes ONE MIDI channel (or a small set of channels) out of a hardware sequencer into everything the rack needs to play that track — pitch, gate, velocity, two assignable CC taps, a by-note-number gate, AND a polyphonic chord output. The intended workflow is DAW-style 'one MIDI channel = one instrument': assign each track of an external sequencer (Reliq, Cre8audio Programm, Empress ZOIA, …) to its own MIDI channel, drop one MIDI LANE per instrument, and point each lane at its track's channel. It is the channel-aware successor of MIDI-CV-BUDDY: the mono pitch/gate/velocity behave the same (a voice-priority winner of the held stack), but a multi-select channel filter, a learn-assignable CC bank, a by-note gate, and an always-live poly output are added. The card's `mode` setting governs only the MONO outputs — 'mono' collapses a held chord to one winning note on PITCH/GATE, 'poly' leaves those quiet — while the POLY output carries the whole held chord in BOTH modes. Device, channel set, voice priority, retrigger, mode, CC# assignments and the note# are all discrete card settings saved in the patch (no audio-side knobs). The SAME outputs drive video modules for free via the cross-domain CV/gate bridge.

the faceplate

0 inputs · 7 outputs · 0 params

about this module

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

outputs

id	cable	what it does
`pitch_cv`	cv	The winning held note as pitch CV in volts-per-octave (0V = C4 = MIDI 60), with pitch-bend summed in. Driven only when the card's mode is 'mono' (it follows the voice-priority winner of the held stack and latches the last note); in 'poly' mode it stays quiet and you use the POLY output instead. control voltage (CV)
`gate`	gate	High while any key on this lane's channel(s) is held, with a brief retrigger dip so downstream envelopes re-fire. Driven only in 'mono' mode (it sits low in 'poly' mode). Patch it into an envelope or VCA gate. gate / trigger
`velocity_cv`	cv	How hard the most recent note was struck, as 0..1 CV (MIDI velocity / 127), latched between events. Route it to a VCA level or filter cutoff for velocity dynamics. control voltage (CV)
`cc_a`	cv	Learn-assignable Continuous-Controller tap A, output as 0..1 CV: it follows whatever MIDI CC number the card has assigned to slot A (e.g. a mod wheel or a track's automation lane on this channel). Wire it to an audio param — or, via the cross-domain bridge, a video param — for hands-on modulation from the external gear. control voltage (CV)
`cc_b`	cv	Learn-assignable Continuous-Controller tap B, a second independent 0..1 CV tap following its own card-assigned CC number — a second modulation lane alongside cc_a. control voltage (CV)
`note_gate`	gate	A gate that fires when the SPECIFIC MIDI note number selected on the card arrives on this lane's channel(s) (defaults to GM kick, MIDI 36). It generalizes the per-device drum-router pattern (e.g. the Programm's ch10 by-note triggers) through one configurable port — patch it into a drum voice's strike or any trigger input. gate / trigger
`poly`	polyPitchGate	A polyphonic pitch+gate bus (up to 10 voices) that ALWAYS carries the full held chord, in both 'mono' and 'poly' modes. Wire it to a poly-aware voice — POLYHELM, DX7, CUBE, or a module with a poly input — and the chord plays straight away with no mode toggle. This is the real polyphonic source chain: MIDI LANE.poly → poly synth produces audible chords (it does not need the mono outputs). poly pitch+gate bus; 10-channel poly bus (5 pitch + 5 gate lanes)

source

midi-lane.ts on GitHub.