V15 patch (czietz)
| Author | Christian Zietz (czietz) |
|---|---|
| License | Unlicense (public domain) |
| Repository | https://github.com/czietz/fm1-firmware-patcher |
| Based on | stock V15 (binary patch) |
| Emulates / engines |
|
The smallest mod in the entire scene: a Python script that modifies the official V15 firmware
in exactly four places, byte by byte. (1) The corrected detune to match Dexed/Yamaha’s
DX7 — the bug traced on Elektronauts (credit to Kris Naphtali) and admitted by M-VAVE’s own
support: they used exp2 instead of exp in the msfa formula. (2) Out with the aftertouch
vibrato. (3) Blue oscilloscope. (4) Green FX cursor — its “you’re running custom
firmware” indicator.
The V14 detour
The operational caveat: you must downgrade to V14 first. M-UPGRADE compares the patched V15 against stock and sees them as identical — four bytes don’t change the version — so it refuses to install it; the detour through V14, and the same one on the way back, are part of the ritual.
Status
Stable, Unlicense — public domain —, dating from September 27. The same detune was fixed by Baud Girl FM-1+VA on its own and in its own way; this patch is the minimal route for anyone who doesn’t want to change firmwares. More of the world around it in the ecosystem.
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