: The chip contains a built-in ROM featuring 15 hard-coded melody tones (such as piano, violin, and synthesizer) and 5 rhythm/percussion tones (bass drum, snare, tom, top cymbal, and hi-hat).
The instruments.bin file is a direct, byte-for-byte representation of the registry data required to program the YM2413's user instrument slot. Typically, this file is small, representing 8 bytes of data per patch, as defined by the OPLL's internal registers (often addresses Structure of a YM2413 Instrument ym2413+instrumentsbin
This allows you to turn the YM2413 from a "preset jukebox" into a truly flexible synthesizer. You can simulate: : The chip contains a built-in ROM featuring
: 15 built-in instruments + 1 user-definable slot. this file is small