With a (not included) powerpak you can use the expansion out to create songs on famitracker and mml for the following chips: FDS, NSF, VRC4, VRC6, N106
Btw the mods connect very simply to a NES Mobo, so if you wanted to go nuts and add more mods you can easily do so and replace if you mess the NES up. The cart slot lid has a chunk I took out for the midines cable so it can close flush, but you can easily swap that part of from another unit should you want to do that.
I'm selling my XIK modded NES. This contains a new power supply that powers the unit and also two burr brown preamps for pu 1+2 and dmc/noise/triangle channels. There is tons of gain on it so you can crank it up to a nice fuzzy distortion or just leave it at loud and clean. Ive replaced the first pot because it cracked, and added a powerpak compatible expansion audio out mod that is unamplified.
Looking for $350 or a trade perhaps for a dmg with internal arduinoboy, or an audio komplete 6 or casio vz-1 or ???