Now is a good time to pick up an Expansion Port Sound Module for the #NES (there are a few in stock): https://www.muramasaentertainment.com/product/expansion-port-sound-module-epsm/
I don't know if any games exist that use it, yet, so this is more for developers, tinkerers and #chiptune composers who want 15 more channels of audio on the NES. This makes me want to write a NES game again.
more info: https://www.nesdev.org/wiki/Expansion_Port_Sound_Module
Apparently, there is already support in #FamiStudio (chiptune tracker for NES) and Mesen2 / Mesen-X emulators.


