*[https://moddingwiki.shikadi.net/wiki/OPL_chip Programmer's guide to OPL3]
*[https://docs.google.com/document/d/18IGx18NQY_Q1PJVZ-bHywao9bhsDoAqoIn1rIm42nwo/ OPLx decapsulated]
*[https://www.righto.com/search/label/dx7 Yamaha DX7 chip reverse-engineered] from die shots
*[https://youtu.be/BCwn26FePAo Yamaha DX7 - Famous Sounds Demo] Yamaha FM synthesis chips defined the sound of the 1980s