If you run an emulator for a game like King's Quest IV (Sierra) or Thexder (MSX) without the proper ym2413_instruments.bin , the game will attempt to call custom patch data that doesn't exist. The result is silence or distorted carrier waves that sound like white noise.
00 00 00 00 00 0F 0F F0
If you have downloaded a game that requires "OPLL custom mode," here is how to apply the correct .bin file on popular platforms. ym2413+instrumentsbin
The YM2413, also known as the OPL3-L or simply OPL, is an audio chip developed by Yamaha Corporation. It was widely used in the 1980s and 1990s for generating music and sound effects in various devices, most notably in computers, video game consoles, and arcade machines. The chip was capable of producing high-quality audio for its time, using a form of audio synthesis called FM synthesis (Frequency Modulation synthesis). This technology allowed for the creation of complex sounds and textures using a limited number of audio channels. If you run an emulator for a game
Note: Some implementations store multiple instruments (e.g., 15 patches) in one instruments.bin , but the standard is . The YM2413, also known as the OPL3-L or
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.