Some arcade machines contained special hardware to generate certain sounds. Emulating this hardware may be tricky and the flash memory size of the ESP32 allows to store some of these as digital sound samples.
This directory contains one sample needed for the explosion sound in Galaga and three more samples for Donkey Kong.
These have to be converted into C source code using the romconv.py tool.
../romconv/romconv.py galaga_sample_boom ./galaga_boom.s8 ../galagino/galaga_sample_boom.h
Donkey Kong does most audio via its MB8884/I8048 audio CPU. But three sounds are generated via discrete logic including three variants of the walk sound. These are still regenerated using samples.
../romconv/romconv.py dkong_sample_walk0 ./dkong_walk0.s8 ../galagino/dkong_sample_walk0.h
../romconv/romconv.py dkong_sample_walk1 ./dkong_walk1.s8 ../galagino/dkong_sample_walk1.h
../romconv/romconv.py dkong_sample_walk2 ./dkong_walk2.s8 ../galagino/dkong_sample_walk2.h
../romconv/romconv.py dkong_sample_jump ./dkong_jump.s8 ../galagino/dkong_sample_jump.h
../romconv/romconv.py dkong_sample_stomp ./dkong_stomp.s8 ../galagino/dkong_sample_stomp.h