CS80.COM is the synthesizer module and replacement circuit aspect of Old Crow's Synth Shop. Scott Rider, aka the Old Crow, is an analog/digital hardware EE who has been designing musical electronics since 1979. "CS80.COM" refers to Crow's love of the venerable Yamaha CS-80, a.k.a. the "Blade Runner Machine" -- a synthesizer used extensively by Vangelis in the late 1970s and through the 1980s as his main instruments. Crow's modules convey his desire to recover the voicing of the CS series while using standard parts yet not losing the musical profile of the instrument. If it doesn't sound like a CS machine, Crow hasn't done his job. Enjoy.