In response to Robert Pintar's message yesterday about
Duo-Art expression encoding:

What you describe is much closer to Themodist-Metrostyle coding than
Duo-Art.  The DuoArt divides the keyboard in half. There are theme and
accompaniment level setting perforations, each of which is basically a
4 bit binary level.  There are "snakebites" at bothe ends of the
tracker, and they shift that side of the keyboard to the theme
regulator momentarily.  The snakebites are a momentary effect - it is
possible to pull out a single note from a very fast run. The snakebites
are very small holes, and they used two side by side to get enough area
to work.  Their hole is a thin horizintal slot.

To sum up, the entire keyboard normally runs off the accompaniment
regulator.  When a snakebite passes over the slot at either the bass or
treble end, it shifts that side of the keyboard momentarily to the
theme regulator.

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Tom Dimock  ----  Cornell University  ----  tad1@cornell.edu
"There go my people.  I must follow them, for I am their leader."  M. Gandhi