Yoshiaki Inose Sound Driver

The page states that the driver used by Hasuya appears to be based on the code of Yoshiaki Inose's sound driver. The driver is described as weak, unable to interrupt music with sound effects, which is why the triangle and noise channels are largely unused in the music (reserved for sound effects). Hasuya reportedly wrote the audio using hexadecimal notation. The driver is not given a formal product name.