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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>
51 lines
2.0 KiB
Markdown
51 lines
2.0 KiB
Markdown
# MIDI setup
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```
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Seedbox OUT KIT ──▶ sampler / drum machine MIDI IN
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Seedbox OUT SYNTH ──▶ poly synth MIDI IN
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sampler MIDI OUT ──▶ Seedbox IN (only needed to learn pads)
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```
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All three Seedbox jacks are 3.5 mm TRS, Type A (tip = pin 5, ring = pin 4, sleeve = pin 2).
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| Other end | Cable |
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|---|---|
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| 3.5 mm TRS, Type A (e.g. SP-404MKII) | plain stereo 3.5 mm cable |
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| 5-pin DIN (e.g. MiniFreak) | TRS-to-DIN adapter marked Type A |
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| 3.5 mm TRS, Type B | Type A ↔ B converter |
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A Type B adapter on a Type A jack swaps tip and ring: you get no MIDI, but nothing is damaged.
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Both OUTs carry MIDI clock (start, 24 PPQN clock, stop) when clock is enabled. Song Position Pointer is not sent.
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## Kit (sampler or drum machine)
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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.
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### Learn a pad
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1. Connect the sampler's MIDI OUT to Seedbox IN. In the simulator, choose it as the input port.
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2. LEARN page, push the encoder: the screen says PICK TRACK.
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3. Press a kit track button (KICK … PERC): HIT PAD.
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4. Hit the pad. Seedbox stores its channel and note.
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Kit tracks that aren't learned stay silent and show a dot on the screen map.
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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.
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## Synth
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- Poly mode, so bass, melody and pad can overlap.
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- Set its MIDI channel to match Seedbox's synth channel (bench setting, default 1).
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- An octave offset is available on the bench.
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- STOP sends CC 120 and CC 123.
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## Hardware notes
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- The MIDI OUTs follow the MIDI 1.0 3.3 V electrical spec (CA-033):
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- TX goes through 10 Ω to the tip (pin 5).
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- 3.3 V goes through 33 Ω to the ring (pin 4).
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- The sleeve (pin 2) is ground.
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- 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.
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- Details are in [hardware/wiring.md](hardware/wiring.md).
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