As far as I know this is the longest NSF that uses the 5B musically, exclusively, AND uses all of its features (envgen, noise, multimode channels, mode combos). This is basically me making an MSX play music at half its normal clock speed, except the chip is on a cartridge and it's the Famicom.
Captured from real hardware.

Famicompo Pico 2015 - Buzzer (Jochen Hippel/Mad Max)

I make chipmusic for the Gameboy, AY/YM computers (especially MSX), PC-88/98, and NES/Famicom and its variety of expansion chips. Hopefully you find something you like!

Famicompo Pico 2015 - Buzzer (Jochen Hippel/Mad Max)

iyatemu