Cwejman S1 MK2 MIDI CC chart, NRPN and OSC map¶
The Cwejman S1 MK2 MIDI implementation: 117 CC, 16 NRPN, each named, for Claude (MCP), SuperCollider or any OSC app.
| Device | Cwejman S1 MK2 |
|---|---|
| Vendor | Cwejman |
| OSC prefix | /s1_mk2 |
| 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/cwejman/s1_mk2.pencilresearch.fw-unknown.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/cwejman/s1_mk2.pencilresearch.fw-unknown.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 s1_mk2: ask “what can the Cwejman S1 MK2 do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (133)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/s1_mk2/global/base_note |
0 / 1 | 0–127 | continuous | Global | |
/s1_mk2/cv_outputs/control_voltage_1_function |
0 / 2 | 0–127 | continuous | CV outputs | |
/s1_mk2/cv_outputs/control_voltage_2_function |
0 / 3 | 0–127 | continuous | CV outputs | |
/s1_mk2/cv_outputs/control_voltage_3_function |
0 / 4 | 0–127 | continuous | CV outputs | |
/s1_mk2/cv_outputs/control_voltage_4_function |
0 / 5 | 0–127 | continuous | CV outputs | |
/s1_mk2/cv_outputs/control_voltage_5_function |
0 / 6 | 0–127 | continuous | CV outputs | |
/s1_mk2/cv_outputs/control_voltage_6_function |
0 / 7 | 0–127 | continuous | CV outputs | |
/s1_mk2/cv_outputs/control_voltage_2_range_scaling |
0 / 9 | 0–63 | continuous | CV outputs | |
/s1_mk2/cv_outputs/control_voltage_2_range_accent_threshold |
0 / 9 | 0–127 | continuous | CV outputs | |
/s1_mk2/cv_outputs/control_voltage_3_range_scaling |
0 / 10 | 0–63 | continuous | CV outputs | |
/s1_mk2/cv_outputs/control_voltage_3_range_accent_threshold |
0 / 10 | 0–127 | continuous | CV outputs | |
/s1_mk2/cv_outputs/control_voltage_4_range_scaling |
0 / 11 | 0–63 | continuous | CV outputs | |
/s1_mk2/cv_outputs/control_voltage_4_range_accent_threshold |
0 / 11 | 0–127 | continuous | CV outputs | |
/s1_mk2/cv_outputs/control_voltage_5_range_scaling |
0 / 12 | 0–63 | continuous | CV outputs | |
/s1_mk2/cv_outputs/control_voltage_5_range_accent_threshold |
0 / 12 | 0–127 | continuous | CV outputs | |
/s1_mk2/cv_outputs/control_voltage_6_range |
0 / 13 | 0–24 | discrete | CV outputs | |
/s1_mk2/pedals/hold_pedal |
64 | 0–127 | continuous | Pedals | |
/s1_mk2/pedals/legato_pedal |
68 | 0–127 | continuous | Pedals | |
/s1_mk2/channel_mode/all_sound_off |
120 | 0–127 | continuous | Channel mode | |
/s1_mk2/channel_mode/reset_all_controllers |
121 | 0–127 | continuous | Channel mode | |
/s1_mk2/channel_mode/all_notes_off |
123 | 0–127 | continuous | Channel mode | |
/s1_mk2/channel_mode/omni_off |
124 | 0–127 | continuous | Channel mode | |
/s1_mk2/channel_mode/omni_on |
125 | 0–127 | continuous | Channel mode | |
/s1_mk2/assignable_parameters_a/assignable_parameter_000 |
0 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_a/assignable_parameter_001 |
1 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_a/assignable_parameter_002 |
2 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_a/assignable_parameter_003 |
3 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_a/assignable_parameter_004 |
4 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_a/assignable_parameter_005 |
5 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_a/assignable_parameter_007 |
7 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_a/assignable_parameter_008 |
8 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_a/assignable_parameter_009 |
9 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_a/assignable_parameter_010 |
10 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_a/assignable_parameter_011 |
11 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_a/assignable_parameter_012 |
12 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_a/assignable_parameter_013 |
13 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_a/assignable_parameter_014 |
14 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_a/assignable_parameter_015 |
15 | 0–127 | continuous | Assignable parameters A | |
/s1_mk2/assignable_parameters_b/assignable_parameter_016 |
16 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_017 |
17 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_018 |
18 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_019 |
19 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_020 |
20 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_021 |
21 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_022 |
22 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_023 |
23 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_024 |
24 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_025 |
25 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_026 |
26 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_027 |
27 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_028 |
28 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_029 |
29 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_030 |
30 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_b/assignable_parameter_031 |
31 | 0–127 | continuous | Assignable parameters B | |
/s1_mk2/assignable_parameters_c/assignable_parameter_032 |
32 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_c/assignable_parameter_033 |
33 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_c/assignable_parameter_034 |
34 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_c/assignable_parameter_035 |
35 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_c/assignable_parameter_036 |
36 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_c/assignable_parameter_037 |
37 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_c/assignable_parameter_039 |
39 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_c/assignable_parameter_040 |
40 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_c/assignable_parameter_041 |
41 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_c/assignable_parameter_042 |
42 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_c/assignable_parameter_043 |
43 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_c/assignable_parameter_044 |
44 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_c/assignable_parameter_045 |
45 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_c/assignable_parameter_046 |
46 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_c/assignable_parameter_047 |
47 | 0–127 | continuous | Assignable parameters C | |
/s1_mk2/assignable_parameters_d/assignable_parameter_048 |
48 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_049 |
49 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_050 |
50 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_051 |
51 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_052 |
52 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_053 |
53 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_054 |
54 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_055 |
55 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_056 |
56 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_057 |
57 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_058 |
58 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_059 |
59 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_060 |
60 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_061 |
61 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_062 |
62 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_d/assignable_parameter_063 |
63 | 0–127 | continuous | Assignable parameters D | |
/s1_mk2/assignable_parameters_e/assignable_parameter_065 |
65 | 0–127 | continuous | Assignable parameters E | |
/s1_mk2/assignable_parameters_e/assignable_parameter_066 |
66 | 0–127 | continuous | Assignable parameters E | |
/s1_mk2/assignable_parameters_e/assignable_parameter_067 |
67 | 0–127 | continuous | Assignable parameters E | |
/s1_mk2/assignable_parameters_e/assignable_parameter_069 |
69 | 0–127 | continuous | Assignable parameters E | |
/s1_mk2/assignable_parameters_e/assignable_parameter_070 |
70 | 0–127 | continuous | Assignable parameters E | |
/s1_mk2/assignable_parameters_e/assignable_parameter_071 |
71 | 0–127 | continuous | Assignable parameters E | |
/s1_mk2/assignable_parameters_e/assignable_parameter_072 |
72 | 0–127 | continuous | Assignable parameters E | |
/s1_mk2/assignable_parameters_e/assignable_parameter_073 |
73 | 0–127 | continuous | Assignable parameters E | |
/s1_mk2/assignable_parameters_e/assignable_parameter_074 |
74 | 0–127 | continuous | Assignable parameters E | |
/s1_mk2/assignable_parameters_e/assignable_parameter_075 |
75 | 0–127 | continuous | Assignable parameters E | |
/s1_mk2/assignable_parameters_e/assignable_parameter_076 |
76 | 0–127 | continuous | Assignable parameters E | |
/s1_mk2/assignable_parameters_e/assignable_parameter_077 |
77 | 0–127 | continuous | Assignable parameters E | |
/s1_mk2/assignable_parameters_e/assignable_parameter_078 |
78 | 0–127 | continuous | Assignable parameters E | |
/s1_mk2/assignable_parameters_e/assignable_parameter_079 |
79 | 0–127 | continuous | Assignable parameters E | |
/s1_mk2/assignable_parameters_f/assignable_parameter_080 |
80 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_081 |
81 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_082 |
82 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_083 |
83 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_084 |
84 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_085 |
85 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_086 |
86 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_087 |
87 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_088 |
88 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_089 |
89 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_090 |
90 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_091 |
91 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_092 |
92 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_093 |
93 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_094 |
94 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_f/assignable_parameter_095 |
95 | 0–127 | continuous | Assignable parameters F | |
/s1_mk2/assignable_parameters_g/assignable_parameter_102 |
102 | 0–127 | continuous | Assignable parameters G | |
/s1_mk2/assignable_parameters_g/assignable_parameter_103 |
103 | 0–127 | continuous | Assignable parameters G | |
/s1_mk2/assignable_parameters_g/assignable_parameter_104 |
104 | 0–127 | continuous | Assignable parameters G | |
/s1_mk2/assignable_parameters_g/assignable_parameter_105 |
105 | 0–127 | continuous | Assignable parameters G | |
/s1_mk2/assignable_parameters_g/assignable_parameter_106 |
106 | 0–127 | continuous | Assignable parameters G | |
/s1_mk2/assignable_parameters_g/assignable_parameter_107 |
107 | 0–127 | continuous | Assignable parameters G | |
/s1_mk2/assignable_parameters_g/assignable_parameter_108 |
108 | 0–127 | continuous | Assignable parameters G | |
/s1_mk2/assignable_parameters_g/assignable_parameter_109 |
109 | 0–127 | continuous | Assignable parameters G | |
/s1_mk2/assignable_parameters_g/assignable_parameter_110 |
110 | 0–127 | continuous | Assignable parameters G | |
/s1_mk2/assignable_parameters_g/assignable_parameter_111 |
111 | 0–127 | continuous | Assignable parameters G | |
/s1_mk2/assignable_parameters_h/assignable_parameter_112 |
112 | 0–127 | continuous | Assignable parameters H | |
/s1_mk2/assignable_parameters_h/assignable_parameter_113 |
113 | 0–127 | continuous | Assignable parameters H | |
/s1_mk2/assignable_parameters_h/assignable_parameter_114 |
114 | 0–127 | continuous | Assignable parameters H | |
/s1_mk2/assignable_parameters_h/assignable_parameter_115 |
115 | 0–127 | continuous | Assignable parameters H | |
/s1_mk2/assignable_parameters_h/assignable_parameter_116 |
116 | 0–127 | continuous | Assignable parameters H | |
/s1_mk2/assignable_parameters_h/assignable_parameter_117 |
117 | 0–127 | continuous | Assignable parameters H | |
/s1_mk2/assignable_parameters_h/assignable_parameter_118 |
118 | 0–127 | continuous | Assignable parameters H | |
/s1_mk2/assignable_parameters_h/assignable_parameter_119 |
119 | 0–127 | continuous | Assignable parameters H |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /s1_mk2/note/on <note> <velocity>, /s1_mk2/cc/<number> <value>, /s1_mk2/pitchbend <0-16383>, /s1_mk2/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.
Frequently asked questions¶
How many parameters of the Cwejman S1 MK2 can be controlled over MIDI?
SynthHub's map of the Cwejman S1 MK2 lists 117 MIDI CC and 16 NRPN 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 Cwejman S1 MK2?
Yes: SynthHub's hosted MCP server knows the Cwejman S1 MK2's MIDI map, and its browser relay lets the agent send it parameter changes or load a sound, each sound change confirmed by you.