[ Gordon Ramsey wrote in 131121 MMDigest:

> When 88-note rolls are converted to MIDI files, how is the sustain
> encoded?  Is this a separate channel out of the range of playing
> notes?  Is there also a MIDI channel for a soft pedal?

Yamaha Disklaviers and QRS players use controllers 64 and 67 for
sustain and una corda, like most synthesizers.  Pianos that allow
MIDI control of the sostenuto pedal use controller 66.  These
controllers are written into the MIDI specification.

Paul D. Lehrman, PhD
Lecturer in Music / Director, Program in Music Engineering
Tufts University, Medford, Massachusetts
paul.lehrman@tufts.edu.geentroep [delete ".geentroep" to reply]