On a stock DX7, the keyboard's velocity controls the amplitude (volume) of the whole sound. In the 600 Voices PDF patches, the programmers mapped velocity to control timbre itself. A soft press yields a dark, muted tone. A hard press brings in high-frequency harmonics, bite, and overdrive.

for added realism, especially for woodwind and brass sounds. loading the digital Sysex files onto your DX7? Dave Benson's DX7 Page

One afternoon, decades later, Kai opened the PDF to a page he had never reached before: Voice 600. The last entry was different from the rest—no detailed algorithm, no field notes, no photo. Instead there was an empty patch template and a single sentence in handwriting he recognized: "Leave a voice for the next person."

: A primary online resource that lists the full categories of sounds included in the Amsco collection, such as Steinway pianos, Rhodes, strings, brass, and woodwinds. You can view the categorized lists on the Amsco 600 Voices soundbank page The Complete DX7 PDF : Though technically a different title, Howard Massey's "The Complete DX7"