Kitbasher
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Start with your firmware
Choose your original OS 1.63, X.13, X.14 or M's DEV firmware. Everything runs in this browser; your file stays on your computer.
Firmware compatibility details
Choose models
Select to include. Click a name for details.Load model packs
Replacing a catalog? Load core.json and its family packs together.
Memory
DSP memoryLoad firmware to calculate
Names & menusLoad firmware to calculate
Firmware storageChecked when you continue
Details
All three must fit.
Firmware storage is checked when you continue.
Remove models or trim E12 samples.
Auto trims E12 samples to fit your models. Keep originals if you prefer, then remove models if needed.
Trimming shortens sample tails.
Download firmware
Installation & compatibility
- Back up first: GLOBAL › SYSEX SEND › ALL into a SysEx recorder. Send the new file from the boot menu (hold FUNCTION at power-on, then [5 LT] MIDI UPGRADE), slowly: a 20 ms gap between messages.
- A failed or unwanted update is recovered the same way, by sending your original file again. The boot menu is never rewritten.
- Kits store machine IDs. Keep your saved layout when rebuilding firmware for existing kits.