Sequential Fourm: MIDI CC, NRPN and OSC map¶
The Sequential Fourm as named OSC addresses — 101 CC — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | Sequential Fourm |
|---|---|
| Vendor | Sequential |
| OSC prefix | /fourm |
| Source | 📦 Derived from MIDI Guide (community CC/NRPN data) |
| Firmware | unknown |
| Revision | per pencilresearch canonical CSV |
| Upstream | pencilresearch |
| Data licence | CC-BY-SA-4.0 — MIDI Guide (https://midi.guide) by Pencil Research and contributors |
| Driver file | devices/sequential/fourm.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.
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/sequential/fourm.json --out-port <N> --in-port <M>
Then send OSC to 127.0.0.1:7777, for example:
From Claude or any MCP client, the osc-bridge mcp server exposes this driver as fourm: ask “what can the Sequential Fourm do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (101)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/fourm/oscillator_1/osc1_octave |
12 | 0–4 | continuous | Oscillator 1 | |
/fourm/oscillator_1/osc1_freq |
13 | 0–127 | continuous | Oscillator 1 | |
/fourm/oscillator_1/osc1_sync |
14 | 0–1 | switch | Oscillator 1 | |
/fourm/oscillator_1/osc1_saw |
15 | 0–1 | switch | Oscillator 1 | |
/fourm/oscillator_1/osc1_pulse |
16 | 0–1 | switch | Oscillator 1 | |
/fourm/oscillator_1/osc1_pw |
17 | 0–127 | continuous | Oscillator 1 | |
/fourm/oscillator_1/osc1_level |
18 | 0–127 | continuous | Oscillator 1 | |
/fourm/oscillator_2/osc2_octave |
19 | 0–6 | continuous | Oscillator 2 | |
/fourm/oscillator_2/osc2_freq |
20 | 0–127 | continuous | Oscillator 2 | |
/fourm/oscillator_2/osc2_tri |
21 | 0–1 | switch | Oscillator 2 | |
/fourm/oscillator_2/osc2_saw |
22 | 0–1 | switch | Oscillator 2 | |
/fourm/oscillator_2/osc2_pulse |
23 | 0–1 | switch | Oscillator 2 | |
/fourm/oscillator_2/osc2_pw |
24 | 0–127 | continuous | Oscillator 2 | |
/fourm/oscillator_2/osc2_level |
25 | 0–127 | continuous | Oscillator 2 | |
/fourm/noise/on |
26 | 0–1 | switch | Noise | |
/fourm/noise/level |
27 | 0–127 | continuous | Noise | |
/fourm/noise/type |
28 | 0–2 | continuous | Noise | |
/fourm/amp_envelope/ampenv_attack |
50 | 0–127 | continuous | Amp envelope | |
/fourm/amp_envelope/ampenv_decy |
51 | 0–127 | continuous | Amp envelope | |
/fourm/amp_envelope/ampenv_sustain |
52 | 0–127 | continuous | Amp envelope | |
/fourm/amp_envelope/ampenv_relase |
53 | 0–127 | continuous | Amp envelope | |
/fourm/amp_envelope/ampenv_velon |
54 | 0–1 | switch | Amp envelope | |
/fourm/amp_envelope/ampenv_velamt |
55 | 0–127 | continuous | Amp envelope | |
/fourm/filter/cutoff |
39 | 0–127 | continuous | Filter | |
/fourm/filter/res |
40 | 0–127 | continuous | Filter | |
/fourm/filter/keytrack |
41 | 0–1 | switch | Filter | |
/fourm/filter/keyamt |
42 | 0–2 | continuous | Filter | |
/fourm/filter_envelope/filtenv_attack |
43 | 0–127 | continuous | Filter envelope | |
/fourm/filter_envelope/filtenv_decay |
44 | 0–127 | continuous | Filter envelope | |
/fourm/filter_envelope/filtenv_sustain |
45 | 0–127 | continuous | Filter envelope | |
/fourm/filter_envelope/filtenv_release |
46 | 0–127 | continuous | Filter envelope | |
/fourm/filter_envelope/filtenv_velon |
47 | 0–1 | switch | Filter envelope | |
/fourm/filter_envelope/filtenv_velamt |
48 | 0–127 | continuous | Filter envelope | |
/fourm/filter_envelope/filtenv_amt |
49 | 0–127 | continuous | Filter envelope | |
/fourm/lfo/sync |
56 | 0–1 | switch | LFO | |
/fourm/lfo/freq |
57 | 0–127 | continuous | LFO | |
/fourm/lfo/freqsync |
58 | 0–15 | continuous | LFO | |
/fourm/lfo/shapes |
59 | 0–15 | continuous | LFO | |
/fourm/lfo/revsaw |
60 | 0–1 | switch | LFO | |
/fourm/lfo/shtype |
61 | 0–5 | continuous | LFO | |
/fourm/arpeggiator/arp_on |
65 | 0–1 | switch | Arpeggiator | |
/fourm/arpeggiator/arp_mode |
66 | 0–7 | continuous | Arpeggiator | |
/fourm/arpeggiator/arp_range |
67 | 0–2 | continuous | Arpeggiator | |
/fourm/arpeggiator/arp_repeat |
68 | 0–3 | continuous | Arpeggiator | |
/fourm/arpeggiator/arp_relatch |
69 | 0–1 | switch | Arpeggiator | |
/fourm/arpeggiator/arp_beatsync |
70 | 0–1 | switch | Arpeggiator | |
/fourm/modulation/modsrc_filterenvroute |
75 | 0–2 | continuous | Modulation | |
/fourm/modulation/modsrc_oscbroute |
76 | 0–2 | continuous | Modulation | |
/fourm/modulation/modsrc_lforoute |
77 | 0–2 | continuous | Modulation | |
/fourm/modulation/modsrc_filterenvamt |
78 | 0–127 | continuous | Modulation | |
/fourm/modulation/modsrc_oscbamt |
79 | 0–127 | continuous | Modulation | |
/fourm/modulation/modsrc_lfoamt |
80 | 0–127 | continuous | Modulation | |
/fourm/modulation/moddst_freqasrcroute |
81 | 0–3 | continuous | Modulation | |
/fourm/modulation/moddst_freqbsrcroute |
82 | 0–3 | continuous | Modulation | |
/fourm/modulation/moddst_pwasrcroute |
83 | 0–3 | continuous | Modulation | |
/fourm/modulation/moddst_pwbsrcroute |
84 | 0–3 | continuous | Modulation | |
/fourm/modulation/moddst_cutoffsrcroute |
85 | 0–3 | continuous | Modulation | |
/fourm/modulation/moddst_ampsrcroute |
86 | 0–3 | continuous | Modulation | |
/fourm/modulation/moddst_lfofreqsrcroute |
87 | 0–3 | continuous | Modulation | |
/fourm/modulation/moddst_lfoamtsrcroute |
88 | 0–3 | continuous | Modulation | |
/fourm/modulation/modsrc_aftertouchamt |
89 | 0–127 | continuous | Modulation | |
/fourm/modulation/moddst_atdest1 |
92 | 0–3 | continuous | Modulation | |
/fourm/modulation/moddst_atdest2 |
93 | 0–3 | continuous | Modulation | |
/fourm/modulation/moddst_atdest3 |
94 | 0–3 | continuous | Modulation | |
/fourm/sequencer/seq_reset |
71 | 1–64 | continuous | Sequencer | |
/fourm/sequencer/seq_playmode |
72 | 0–2 | continuous | Sequencer | |
/fourm/sequencer/seq_moddest |
73 | 0–10 | continuous | Sequencer | |
/fourm/voicing/unison_on |
29 | 0–1 | switch | Voicing | |
/fourm/voicing/unison_voices |
30 | 0–4 | continuous | Voicing | |
/fourm/voicing/unison_detune |
31 | 0–127 | continuous | Voicing | |
/fourm/voicing/voice_volume |
95 | 0–127 | continuous | Voicing | |
/fourm/voicing/mono_mode_on |
126 | 0–127 | continuous | Voicing | |
/fourm/voicing/poly_mode_on |
127 | 0–127 | continuous | Voicing | |
/fourm/general/mod_wheel |
1 | 0–127 | continuous | General | |
/fourm/general/breath_controller |
2 | 0–127 | continuous | General | |
/fourm/general/pitch_bend_range |
3 | 0–12 | continuous | General | |
/fourm/general/foot_controller |
4 | 0–127 | continuous | General | |
/fourm/general/master_volume |
7 | 0–127 | continuous | General | |
/fourm/general/expression_pedal |
11 | 0–127 | continuous | General | |
/fourm/general/glide_on |
33 | 0–1 | switch | General | |
/fourm/general/glide_rate |
34 | 0–127 | continuous | General | |
/fourm/general/glide_mode |
35 | 0–3 | continuous | General | |
/fourm/general/keymode |
36 | 0–2 | continuous | General | |
/fourm/general/env_retrig |
37 | 0–1 | switch | General | |
/fourm/general/brightness |
74 | 0–127 | continuous | General | |
/fourm/general/clock_bpm |
102 | 15–127 | continuous | General | |
/fourm/general/clock_div |
103 | 0–10 | continuous | General | |
/fourm/general/scale |
104 | 0–65 | continuous | General | |
/fourm/general/transpose |
105 | 0–4 | continuous | General | |
/fourm/general/category |
106 | 0–16 | continuous | General | |
/fourm/general/editor_byte |
112 | 0–127 | continuous | General | |
/fourm/general/all_sound_off |
120 | 0–127 | continuous | General | |
/fourm/general/reset_controllers |
121 | 0–127 | continuous | General | |
/fourm/general/local_control_on_off |
122 | 0–127 | continuous | General | |
/fourm/general/all_notes_off |
123 | 0–127 | continuous | General | |
/fourm/general/omni_mode_off |
124 | 0–127 | continuous | General | |
/fourm/general/omni_mode_on |
125 | 0–127 | continuous | General | |
/fourm/general/bank_select_msb |
0 | 0–3 | continuous | General | |
/fourm/general/bank_select_lsb |
32 | 0–3 | continuous | General | |
/fourm/general/data_entry_msb |
6 | 0–127 | continuous | General | |
/fourm/general/data_entry_lsb |
38 | 0–127 | continuous | General |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /fourm/note/on <note> <velocity>, /fourm/cc/<number> <value>, /fourm/pitchbend <0-16383>, /fourm/program_change <n>.
Limitations¶
CC/NRPN only. SysEx (preset management, display control, bulk dump/load, vendor-proprietary opcodes) is NOT covered by pencilresearch. To extend this device with SysEx, sniff the vendor editor, add `sysex.header/footer` + `commands` blocks, and use `update_device.md` PR template.