This is the second in a series of posts on emulating the main Sega Genesis sound chip, the YM2612. Part 1 - Interface This post will describe the FM synthesis channels’ phase generators. Phase Generation Each of the YM2612’s 24 operators contains a phase generator and an ADSR envelope generator.| jsgroth's blog
The Famicom allows cartridges to modify the console’s audio signal between the APU (audio processor) and the TV. Most games don’t do anything with this capability, but some games included expansion audio chips on the cartridge board to enable enhanced audio beyond what the console is normally capable of.| jsgroth.dev