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MMD > Archives > March 1997 > 1997.03.14 > 10Prev  Next

Midi Pedaling and Disklavier
By Robbie Rhodes

Like George Bogatko, I do not own a Disklavier, but I work with music files either created by the Disklavier, or to be reproduced by it. In order to use Midi editing programs I convert the Disklavier file structure from 'Eseq' into Standard Midi File (SMF) format using the file-format conversion software sold by Gary Giebler. It works smoothly and accurately for loss-less conversion between Midi and Eseq file formats.

All of the live performances recorded by a Disklavier which I have edited, from both vertical and grand pianos, exhibit these character- sticks in the native Disklavier Eseq file, described herein as observed after conversion to Midi file, and using the equivalent Standard Midi File parameters (Yamaha names and numbers don't always match Midi conventions):

1. Binary (on-off) damper tray events are recorded as Midi controller #64 (Sustaining Peed.) in channel 1, with values 0 (off) and 127 (on).

2. Pedal push-rod position is recorded as Midi controller #64 in channel 3, with possible values from 0 (off) to 127 (maximum 'on').

3. The timing of the binary damper events seems accurate with respect to the note activity. The timing of the pedal push-rod position data frequently lags behind the binary damper events (and the note data), with a time-delay proportional to note activity, as though the processor in the piano cannot keep up with everything.

I usually disable or erase the pedal push-rod position data and edit the performance using only the binary damper events. Thankfully, I've had no projects which needed continuous position control to implement a musical effect. (Please note that my job is not to reproduce the artist's per- forename -- the customer wants it improved!)

Robbie Rhodes

(Message sent Sat 15 Mar 1997, 02:15:25 GMT, from time zone GMT-0800.)

Key Words in Subject:  Disklavier, Midi, Pedaling

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