Greetings Robert,
In addition to the fact that it is unlikely to cause damage, it should be obvious that a key is held down. My program is designed for testing purposes and it would be a pretty unconscious person who would overlook the fact that the key was down and that the key image on the program graphic was dark purple. Besides this, the key hold feature is really intended for owners of pneumatic pianos for the purpose of holding expression codes on while testing. A DKV owner would probably have no need for the hold function which requires a right mouse click.
Thursday, February 2, 2006, 1:05:35 PM, you wrote:
>
While I cannot guarantee a thing, I personally do not believe that anyone need be concerned about damaging their Disklavier by playing extended notes.�
Here are my fuzzy reasons:
It would not be difficult for a DKV owner to write a MIDI file that would hold a note on for hours. �The Yamaha Disklavier designers surely did not overlook that eventuality.
I have never heard of a key solenoid, or more likely, of a solenoid-driving transistor burning out.
Consider the following statement from a technical manual: "Continuous usage of the DISKLAVIER MK III raises the temperature of the solenoids. Since the playback function of the solenoids (in particular, playback of very soft notes)
degrades as the temperature increases, playback data is automatically compensated (when it is decreased, the data reverts to its original values)."
Also consider the following related to the DGP1/DGA1 PK-CTL board protect function:
Error message: PIANO POWER OFF! or (PWM OVER)
Indication and reason: �The keyboard & sustain, soft /shift pedal playback stop. Playback function cannot be restored until the drive transistor(s) has/have cooled down sufficiently and the power has been turned off, then turned back on. One or more key drive transistors have become too hot and the protect circuit has activated.
I would predict that a long note or notes would shut the DKV down before any damage is done. �While such shutdowns occur infrequently, they are certainly not unheard of.
--�
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