|SuperFamicom Low Level Sound Driver
SuperFamicom Low Level Sound Driver is the name of a sound driver that was created by Rebecca Heineman and John Carmack for Id Software. The driver was only used in two games. Because of the way the sound driver was programmed, SPC files cannot dump the proper data, and instead music must be ripped in the obscure SNSF format.
The source code of Super 3D Noah's Ark was released. While Heineman has the music source code to Wolfenstein 3D, she is not legally allowed to release it due to the game belonging to id Software.