القائمة
Keith McMillen Instruments QuNexus — ultra-portable 25-key USB MIDI keyboard with pressure, tilt, bend pad, and patchable CV/expression on Linux
التثبيت باستخدام Codex أو Claude انسخ هذا Prompt والصقه في Codex أو Claude أو مساعد آخر ليراجع صفحة Skill ويثبّتها لك.
استنادا إلى تصنيف SOC المهني
Use when working with the Sleepy Circuits Hypno 2 video synthesizer/resampler — 2-channel video mixer/looper, shader engine, MIDI CC mapping, CV/modulation, sampler. Firmware v0.0.163+.
Hardware instrument skills — reference guides for each device in the music studio setup.
GLSL fragment shader techniques adapted for the Hypno 2 video synthesizer — single-pass generative visuals and video effects optimized for Raspberry Pi 5, 5-uniform limit, CC-mapped parameters
Korg KAOSS DJ — USB DJ controller with X-Y touchpad, Serato DJ Intro integration, KAOSS effects, EQ, crossfader, and MIDI on Linux
Korg KAOSSILATOR dynamic phrase synthesizer (2007 model) — X-Y touchpad, 100 programs, gate arpeggiator, phrase loop recording, USB MIDI on Linux
Use when working with the Korg kaossilator 2S dynamic phrase synthesizer — X-Y touchpad, 150 programs, 50 arp patterns, loop recording, audio player, master recorder, microSD storage, and USB MIDI on Linux.
| name | qunexus |
| description | Keith McMillen Instruments QuNexus — ultra-portable 25-key USB MIDI keyboard with pressure, tilt, bend pad, and patchable CV/expression on Linux |
| category | instruments |
Keith McMillen QuNexus is a 25-key ultra-portable USB MIDI keyboard with polyphonic aftertouch (pressure), tilt (x/y bend), and patchable CV/expression inputs.
| Spec | Detail |
|---|---|
| Keys | 25 keys (one octave each for C–B, across 2 octaves) |
| Sensors | Pressure (per key), X-tilt, Y-tilt |
| Bend | Touch-sensitive bend pad (horizontal) |
| Inputs | Dual expression (1/4" TRS), CV (1/8" TS) |
| MIDI | USB MIDI, 5-pin DIN (with KMI MIDI Expander) |
| Presets | Multiple configurable presets |
| Power | USB bus powered |
Each key reports polyphonic aftertouch (MIDI Channel Pressure / CP).
Horizontal touch strip above keys: up/down pitch bend. Assignable to CC.
Keys report X (left/right tilt) and Y (front/back tilt) per key.
CV IN — 1/8" TS, accepts +/-10V or 0-5V (switchable)EXPR 1, EXPR 2 — 1/4" TRS expression pedalsPress SHIFT + [0-9] to select preset slots 0-9. Factory presets store common configurations.
Hold SHIFT + MODE to enter CoMA. The QuNexus learns any MIDI mapping from connected software.
Editable via QuNexus Editor software (Mac/Windows/Linux via Wine).
# QuNexus USB MIDI on Linux
amidi -l # find QuNexus port
# QuNexus MIDI channel: per-preset (default=1)
| Message | Data |
|---|---|
| Note On/Off | Standard 0x90/0x80 |
| Channel Pressure | Per-key pressure (0-127) |
| Pitchbend | Bend pad (14-bit, ~0-16383) |
| CC | X-tilt, Y-tilt, expression 1/2 |
| Control | CC |
|---|---|
| X-tilt | 74 (default) |
| Y-tilt | 1 (modwheel) |
| Expression 1 | 7 (volume) |
| Expression 2 | 11 (expression) |
| CV In | 20 |
# QuNexus uses standard USB MIDI class driver
# No special driver needed — appears as USB MIDI device
# Route MIDI
aconnect -i | grep QuNexus
aconnect 128:0 24:0 # to your synth
# Monitor
amidi -p hw:X -d # raw MIDI dump
CV input requires the KMI CV Cable Kit or similar to convert +/-10V CV to 0-5V for the QuNexus.
The QuNexus and QuNeo are both KMI products and share:
Unlike the QuNeo, the QuNexus does NOT have SysEx for preset upload — presets are stored on-device via the editor.
~/Downloads/current_music_docs/qunexus.pdf