[sdiy] Commercial 1v/octave keyboards?

Chris Manders wight446 at yahoo.com
Tue Feb 7 23:48:47 CET 2006


  Just an addition to this thread, as I am also interested in buying (or better building) a 1V/Octave keyboard.
   
  I came upon the following page and schematic, which is based on the 74C922 Keyboard decoder IC.
   
  http://www.cgs.synth.net/modules/cgs10_pedal.html
   
  Now the interesting thing I found out about this is that the GATE pulse is not held constantly on if the Keyboard is played Legato.
  According the the 74C922 data, a normal 'debounce' function is performed when another key is pressed, so the GATE pulse is re-triggered each time.
   
  Depending on what you want, it may be easy to make an addition to this circuit to generate seperate GATE and TRIGGER pulses.
   
  Chris

			
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