Disklavier

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.





Spencer_Lists wrote:

Greetings Adrian,

To turn a note on, you use a right mouse click and the key color
changes to an obvious purple and stays that way until the key is
turned off. Exiting the program will send note off to each note. Does
this sound like adequate protection? I can also make it turn off all
notes after a fixed period of time but think that would be a little
too "safe". I personally am tired of dealing with protection from
doing things I want to do.


Thursday, February 2, 2006, 1:47:59 AM, you wrote:
  

Hi,
    

Just something to be aware of:
    

If you tell a key to stay on until you cancel itand you leave it on
for a considerable length of time (or even forget to cancel it), you
could cause overheating and/or damage to the solenoid, even with the temperature sensors.
    

Adrian Thomas
Milton Keynes
UK
    

On Wed, 1 Feb 2006 13:17 , Spencer_Lists  sent:
    

Greetings Robert,
      

Play notes with a mouse click and stop when click stops. Play notes on
and leave them on until cancelled. Play notes for a precisely
determined period of time. Play notes repeatedly until cancelled with
a precise on and off time. Change the velocity for played notes.


      

-- 
Robert Welcyng
Anchorage, Alaska

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