You may also need to recompile MAME to bypass the SHA1 integrity checks for software lists.

An FM instrument on the YM2413 is defined by a set of parameters for two "Operators" (Modulator and Carrier). The YM2413 requires these to be written to specific registers.

Even with the correct , you might hit walls.

The instruments.bin file is the gateway to unlocking custom audio on the Yamaha YM2413. By understanding how the 8 bytes of register data control the 2-operator FM synthesis, users can significantly expand the sonic capabilities of the OPLL, pushing the boundaries of 8-bit sound design. To better assist you, are you:

(starting from version 0.231) to accurately replicate the internal instrument data of the Yamaha YM2413 (OPLL) FM sound chip. This chip, famous for powering the Sega Master System Konami VRC7