Faderfox PC12 Web Editor

A browser-based configuration editor for the Faderfox PC12 MIDI controller. Edit control assignments, channels, value ranges, and modes — then send setups directly to the device over USB via Web MIDI.

Requirements

• Browser: Chrome or Edge (Web MIDI with SysEx support required)
• Connection: Faderfox PC12 connected via USB

Firefox and Safari do not support Web MIDI. Use a Chromium-based browser.

Getting Started

1. Open index.html in Chrome or Edge
2. Allow MIDI access when prompted (the browser will ask for SysEx permission)
3. Select the PC12 from the MIDI In and MIDI Out dropdowns (auto-detected if the name contains "Faderfox")

Receiving a Setup from the PC12

1. Click Receive from Device in the toolbar
2. On the PC12, enter Setup Mode: hold the red Shift button and press the blue button
3. Select the setup you want to dump using Taste 1 (encoder to choose Setup 1–30)
4. Press and hold Taste 7 (Send):
   • Sndc — sends the currently selected setup
   • SndA — sends all 8 setups (use encoder to toggle, then hold the button until the progress bars complete)
5. The editor grid will populate automatically when the SysEx dump is received

Editing Controls

The grid mirrors the physical layout of the PC12:

Section	Description
Rows A–F	72 potentiometers (12 per row)
Row G	12 green buttons with LEDs
Enc	Push-encoder and encoder push button

Click any cell in the grid to open the parameter editor on the right side.

Parameters per Control

Parameter	Description
Command Type	CC Absolute, CC Relative, Note, Program Change, Pitchbend, Aftertouch, CC 14-bit
MIDI Channel	Channel 1–16
CC / Note Number	Controller or note number 0–127
Lower Value	Minimum value (poti start / button release)
Upper Value	Maximum value (poti end / button press)
Mode	Potis: Jump or Snap · Buttons: Momentary or Toggle · Encoder: Acceleration 0–3
Display Scale	OFF, Standard (0–127), Bipolar (-63 to 63), or External (buttons)

Batch Editing

• Copy to Row — copies the selected control's settings across all 12 positions in the same row (CC numbers increment automatically)
• Copy to Column — copies settings down the column across rows A–F

Sending a Setup to the PC12

1. On the PC12, enter Setup Mode (hold red Shift + press blue)
2. Press and hold Taste 8 (Receive) until the display shows rc00
3. In the editor, click Send to Device
4. The PC12 display will show progress (rc01...rc99) and return to normal when done

If the display shows Err, press the red Shift button and re-enter Receive mode to try again.

File Import / Export

Action	Format	Description
Export .syx	Binary SysEx	Standard .syx file, compatible with MIDI librarian tools (Bome SendSX, Snoize SysEx Librarian)
Export JSON	JSON	Human-readable dump with all control parameters and raw hex data
Import	.syx, .json, .bin	Load a previously saved setup into the editor

Factory Reset

Click Reset Setup to restore the current setup to factory defaults:

• Potis: CC 1–72 across rows A–F, channel 1, CC Absolute, Jump mode, range 0–127
• Buttons: CC 73–84 on row G, toggle mode
• Encoder: CC 85 (absolute), Encoder push: CC 86 (note, momentary)

This only resets the editor data. To reset the PC12 itself, use Setup Mode → Taste 6 on the device.

Project Files

File	Purpose
index.html	The editor application (single-file, no build step)

License

This is an unofficial community tool. Faderfox is a trademark of Mathias Fuchß Software-Entwicklung, Hamburg, Germany.