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First commit of the repo. Contents beyond the v0.1 simulator and layout: - Full Pico 2 W firmware (firmware/app, drivers, engine port, host test). - BANK page and 404 mode A/B removed; learned pads play exactly what was learned. - 404/MiniFreak renamed to KIT/SYNTH throughout (jacks, code, sim, docs, layout labels; wiring rebuilt). - ROLL returns to page select after a re-roll; a freshly learned track turns on. - LCD contrast 66. - ROOT and SCALE pages: 21 scales, AUTO = the seed picks; global and sticky. Intended music change: the scale table grew from 8 to 21 and AUTO picks from all of them, so every seed's scale changed. Vectors regenerated with npm run vectors, plus new key-override cases. Flash record is now version 2. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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MIDI setup
Seedbox OUT KIT ──▶ sampler / drum machine MIDI IN
Seedbox OUT SYNTH ──▶ poly synth MIDI IN
sampler MIDI OUT ──▶ Seedbox IN (only needed to learn pads)
All three Seedbox jacks are 3.5 mm TRS, Type A (tip = pin 5, ring = pin 4, sleeve = pin 2).
| Other end | Cable |
|---|---|
| 3.5 mm TRS, Type A (e.g. SP-404MKII) | plain stereo 3.5 mm cable |
| 5-pin DIN (e.g. MiniFreak) | TRS-to-DIN adapter marked Type A |
| 3.5 mm TRS, Type B | Type A ↔ B converter |
A Type B adapter on a Type A jack swaps tip and ring: you get no MIDI, but nothing is damaged.
Both OUTs carry MIDI clock (start, 24 PPQN clock, stop) when clock is enabled. Song Position Pointer is not sent.
Kit (sampler or drum machine)
Pads are learned, not typed in, so any sampler or drum machine that sends a note-on per pad works. Seedbox plays exactly the channel and note it learned. To use another bank or kit, re-learn the pads there.
Learn a pad
- Connect the sampler's MIDI OUT to Seedbox IN. In the simulator, choose it as the input port.
- LEARN page, push the encoder: the screen says PICK TRACK.
- Press a kit track button (KICK … PERC): HIT PAD.
- Hit the pad. Seedbox stores its channel and note.
Kit tracks that aren't learned stay silent and show a dot on the screen map.
STOP sends All Sound Off (CC 120) on every learned kit channel. Some samplers ignore All Notes Off (the SP-404MKII does), but they do obey CC 120.
Synth
- Poly mode, so bass, melody and pad can overlap.
- Set its MIDI channel to match Seedbox's synth channel (bench setting, default 1).
- An octave offset is available on the bench.
- STOP sends CC 120 and CC 123.
Hardware notes
- The MIDI OUTs follow the MIDI 1.0 3.3 V electrical spec (CA-033):
- TX goes through 10 Ω to the tip (pin 5).
- 3.3 V goes through 33 Ω to the ring (pin 4).
- The sleeve (pin 2) is ground.
- MIDI IN uses a 6N137 optocoupler powered from 5 V, with its enable pin tied high and its output pulled up to 3.3 V.
- Details are in hardware/wiring.md.