Iku Mizutani is a Japanese composer, sound designer, and audio programmer. He started out working for Konami around 1986 and as a result, was a part of their interior sound team, the Konami Kukeiha Club, and during his time at there, he mostly worked on the Famicom. Around 1989, Mizutani left Konami and started working at Natsume. He programmed two different sound drivers for the NES while at the company, as well as drivers for the other platforms the company developed for like the Sega Master System and Game Boy. During his time both at Konami and Natsume, he worked with many other sound designers.
Today, Mizutani is currently the president of Sound Fountain. With his company, he continues to create music and sound effects for the games. The company works primarily on the King of Fighters and Medabots series.
Mizutani created the sound drivers at Natsume and the music was programmed in binary/hexadecimal. There were two versions of the sound driver. The first one was used in Dungeon Magic and Heroes of the Lance, and the rest of the games used a whole new sound driver.
Mizutani created MIDI files. Then he loaded his MIDI files into a debugger where he would convert the MIDI file to text. Next, he would modify the music in the debugger. Then he would initialize it. Mizutani used instrument samples from many Roland devices such as the S-330, D-550, SC-55 Mk II and Yamaha TX-802.
Mizutani used Natsume's own sound driver.