🔧 Format insight: Each instrument entry is 8 bytes — carrier/modulator envelope, feedback, FM depth, and more.

#YM2413 #OPLL #ChipMusic #ReverseEngineering #FMArchives Subject: Inside Ym2413 Instruments.bin – Understanding the OPLL Sound Bank

15 presets. 2 custom slots. 8 bytes each. Retro synth perfection.

Drop a 🎹 if you’d tweak the envelope attack on the “violin” preset.

The file is a raw dump of the instrument parameter table used by Yamaha’s OPLL FM synth. Unlike full-blown OPL2/3, the YM2413 uses a hybrid of preset + customizable slots.

Here’s a social media post you can use for — tailored for different platforms and audiences. 🎵 Option 1: Technical / Retro Dev (Twitter/X, Mastodon, Discord) Title: Digging into the YM2413 Instruments.bin

Just extracted and mapped the instrument bank from the classic (OPLL) FM synth chip. 🎹