In MMD 970307, George Bogatko asked about playing a MIDI file on a
Disklavier.  George, I downloaded the file and tried it.  The pedaling
information you have included in the file caused some problems.  The
details follow.

I have an MX100B (it supports partial pedaling information).  I played
the file from a sequencer.  As expected, Yamaha interprets a MIDI pedal
commands as an "off" or "on" state, failing to recognize intermediate
values.  Any level of pedal information other than none, results in full
pedaling.

I edited the file to remove the partial pedaling, but leaving in the full
pedaling where you specified.  It worked fine, but I know it isn't what
you wanted the performance to be.

It is possible that later Disklaviers are smarter about this stuff.  In
their own proprietary encoding, partial pedaling is supported on all but
one of the Disklavier models, I believe.

Bob Fitterman¶
bobf@ilx.com