Knob control
With knob control on, the CT MIDI-track knobs edit the values of the current page. Knobs 1 to 8 (CC 80 to 87 on the knob channel) edit the eight values of the page from left to right. A knob move changes the track’s own value. It is not a step lock. TrackJammer only listens to the knob messages the CT sends; it does not change the sounds on the CT.
Not yet verified on hardware
In the app code, knob control listens on one MIDI channel only: the knob channel set below, which is 3 by default from the Circuit Tracks preset (the first MIDI track). A knob on another channel is not heard until you pick that channel. The channel and CC numbers of the knobs depend on the CT track and its template. A bench capture reported that Synth 1 and 2 knobs send CC 80 to 87 on channels 1 and 2 and still change the CT sound, and that MIDI tracks send what their template says. This has not been checked with TrackJammer on hardware.
Turn it on
- Open Global > LFO. See Global LFO.
- Tap option 24 (pad 24) to turn knob control on. It is off by default.
- To pick the knob channel, tap pad 75, then tap a value pad: 41 to 48 and 31 to 38 give channels 1 to 16. Tapping the channel that is already set returns to the preset channel.
The Matrix panel in the Godot window (header button Matrix) shows a knob map: which knob edits which value, and whether it is picked up yet.
Pickup
A knob does nothing until it reaches the page’s current value. It has to pass that value, or come within a small window of it, so nothing jumps. Changing the page drops every pickup, and the knobs must pick up again.
What the knobs edit
| Page | Knobs 1 to 8 |
|---|---|
| Track > Params | Root, scale, channel, reset bars |
| Track > Feel | Swing, groove, humanize timing, humanize velocity |
| Track > Playback | Direction, launch quantize |
| Track > Voices | Echo, echo time, echo decay, voices, partner |
| Track > Evolution | Evolve every, evolve action, evolve amount, accumulate range |
| Track > Rules, Rack | None |
| Beats > Length | Length |
| Beats > Beats | Beats, evenness, beats B |
| Beats > Accent | Accents, accent strength |
| Beats > Steps, Repeat, Conditions, Drum map | None |
| Keys > Velocity | Velocity of steps 1 to 8 |
| Keys > Gate | Gate of steps 1 to 8 |
| Keys > Harmony | Global key, chord follow, follow transpose, harmonizer 1, harmonizer 2 |
| Keys > Voice | Inversion, spread, voice leading, arp octaves, arp seed, arp over progression |
| Keys > Notes, Type, Voicing, Source | None |
| CC 1 to CC 4 | Steps 1 to 8 of the lane. A moved step switches on. |
| Global > LFO | Shape, rate, depth and phase of the selected LFO |
| PERF | Knob 1 sets the density master |
On/off settings take the lower half of the knob as off and the upper half as on.
Gotchas
- Knob moves on Keys > Velocity, Keys > Gate and the CC lane pages mark the steps they change as hand edits.
- Changing the page drops all pickups.
CT track follow
Global > LFO option 25 (pad 25) turns CT track follow on. When it is on, a track-select message from the CT selects the matching TrackJammer track. Track 1 to 8 on the CT are assumed to map to TrackJammer tracks 1 to 8 in the same order. Off by default.
Not yet verified on hardware
CT track follow has not been checked on hardware. The track order is an assumption.
For recording knob moves into a CC lane, see Curves and motion.