Ym2413_instruments.bin May 2026

The file ym2413_instruments.bin is a binary file that likely contains instrument parameter data for the (also known as the OPLL) sound chip. This chip is a 4-operator FM synthesis chip used in various MSX computers, Sega Master System (as FM sound unit), some arcade boards, and early PC sound cards.

Offset (bytes) : Meaning 0x00 : Instrument 0 (usually user/Rhythm? often unused) 0x04 : Instrument 1 ... 0x3C : Instrument 15 ym2413_instruments.bin

If you can share a hex dump of the first 64 bytes of that file, I can decode the instruments for you. The file ym2413_instruments

Let me clarify — are you asking me to of a specific ym2413_instruments.bin file? Or do you want me to describe the typical layout so you can parse it yourself? often unused) 0x04 : Instrument 1

| Byte | Bits (high–low) | Description | |------|----------------|-------------| | 0 | aa aa aaaa | F-Number low bits (8 bits) — but on YM2413, first byte often contains other params | Wait — actually, the YM2413's internal instrument ROM data is 8 bytes per instrument, but the common 4-byte compressed format is used in some dumps for emulators.