Wikipedia
Decillionix
Decillionix was a company based in Sunnyvale, California which sold computer music hardware and software in the mid-1980s. Its first product was the DX-1 for the Apple II, sold in 1983. The DX-1 consisted of a monophonic 8-bit audio input card, a monophonic 8-bit audio output card, and the DX-1 Effects II software. Decillionix later produced MIDI software and hardware.
Decillionix was run by Dan Retzinger.
Decillionix ceased operations in 1987.