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Roland S-1 (per Electra preset) MIDI CC chart, NRPN and OSC map

The Roland S-1 MIDI implementation: 54 CC, each named, for Claude (MCP), SuperCollider or any OSC app.

Device Roland S-1
Vendor Roland
OSC prefix /s_1
Source 🎛️ Derived from an Electra One community preset
Revision per Electra preset
Upstream electra-preset
Driver file devices/roland/s_1.json
Not tested on the device yet

This driver comes from documentation or community data and has not been checked on real hardware. If you own one, a quick test and a pull request promoting it helps everyone — see CONTRIBUTING.

Other versions of the Roland S-1 (1)

per pencilresearch canonical CSV

How do you control it?

Find the MIDI ports, then start the bridge with this driver:

osc-bridge detect        # prints the ready-to-run line for what is plugged in
osc-bridge run --device devices/roland/s_1.json --out-port <N> --in-port <M>

Then send OSC to 127.0.0.1:7777, for example:

osc-bridge osc-send /s_1/range 2

From Claude or any MCP client, the osc-bridge mcp server exposes this driver as s_1: ask “what can the Roland S-1 do?” and it reads this map with list_routes. See the MCP guide.

MIDI CC and NRPN parameters (54)

OSC address CC NRPN (MSB/LSB) Range Nature Section
/s_1/range 14 0–5 continuous
/s_1/sqr_level 19 0–255 continuous
/s_1/tri_level 20 0–255 continuous
/s_1/fine_tune 76 -100–100 continuous
/s_1/pwm_source 16 0–2 continuous
/s_1/sub_oct_type 22 0–2 continuous
/s_1/lfo 13 0–255 continuous
/s_1/sub_level 21 0–255 continuous
/s_1/noise_level 23 0–255 continuous
/s_1/noise_mode 78 0–1 switch
/s_1/pulse_width 15 0–255 continuous
/s_1/pitch_bend 18 0–120 continuous
/s_1/frequency 74 0–255 continuous
/s_1/resonance 71 0–255 continuous
/s_1/keyboardfollow 26 0–255 continuous
/s_1/reverb_level 91 0–255 continuous
/s_1/delay_level 92 0–255 continuous
/s_1/chorus 93 0–4 continuous
/s_1/lfo 25 0–255 continuous
/s_1/envelope 24 0–255 continuous
/s_1/pitch_bend 27 0–255 continuous
/s_1/reverb_time 89 0–255 continuous
/s_1/delay_time 90 0–15 continuous
/s_1/amp_env_mode 28 0–1 switch
/s_1/rate 3 0–255 continuous
/s_1/mode 79 0–1 switch
/s_1/sync 106 0–1 switch
/s_1/attack 73 0–255 continuous
/s_1/decay 75 0–255 continuous
/s_1/adsr 30 0–127 continuous
/s_1/adsr 72 0–127 continuous
/s_1/wave_form 12 0–5 continuous
/s_1/mod_depth 17 0–255 continuous
/s_1/key_trigger 105 0–1 switch
/s_1/trigger_mode 29 0–2 continuous
/s_1/mod_wheel 1 0–127 continuous
/s_1/expression 11 0–127 continuous
/s_1/damper 64 0–127 continuous
/s_1/transpose 77 -60–60 continuous
/s_1/portamento 65 0–255 continuous
/s_1/pan 10 -100–100 continuous
/s_1/time 5 0–255 continuous
/s_1/mode 31 0–2 continuous
/s_1/switch 107 0–1 switch
/s_1/overtone 103 0–200 continuous
/s_1/poly_mode 80 0–3 continuous
/s_1/voice_2 81 0–1 switch
/s_1/voice_3 82 0–1 switch
/s_1/voice_4 83 0–1 switch
/s_1/multiply 102 10–320 continuous
/s_1/comb 104 10–320 continuous
/s_1/key 85 -12–12 continuous
/s_1/key 86 -12–12 continuous
/s_1/key 87 -12–12 continuous

Performance MIDI

Notes, pitch bend and any CC are also available: /s_1/note/on <note> <velocity>, /s_1/cc/<number> <value>, /s_1/pitchbend <0-16383>, /s_1/program_change <n>.

Limitations

Imported from an Electra One community preset. The mapping reflects the preset author's editorial choices: parameter naming, ranges, and which params are exposed. Untested on hardware in this repo.

Frequently asked questions

How many parameters of the Roland S-1 can be controlled over MIDI?

SynthHub's map of the Roland S-1 lists 54 MIDI CC parameters, each with its number, range and a readable name; the full chart is on this page.

Can an AI agent like Claude control the Roland S-1?

Yes: SynthHub's hosted MCP server knows the Roland S-1's MIDI map, and its browser relay lets the agent send it parameter changes or load a sound, each sound change confirmed by you.