Patches and discussion for Ensoniq VFX family

On Tue, Mar 21, 2017 at 01:19:56PM +0000, wjwilcox@... [Ensoniq-VFX-SD] wrote:
> Thanks for your insights.  I opened up the SD1 last week, removed all the keys, cleaned them and the top of the coil board and inspected for damage.  No apparent physical damage, boards secure.   
> 
>  The aftertouch kicks in as soon as I press a key, any key.  Changing the velocity curve setting has no effect.  The only way I've found to disable it is in preset and sequencer mode, setting pressure to "none".  I played the SD1 via MIDI from a controller and no aftertouch was triggered, so the problem is definately in the keybed's control circuitry.
>  
> 
>  At the suggestion of several independent acquaintences, including a former Ensoniq engineer, I'm going to replace the 68HC11A1P microcontroller on the keybed's control circuit board.  It's an educated guess so we'll see what happens.

Please let us know if that actually fixes it.  Did you try letting
(lifting?) the a key up a bit to see if the aftertouch "goes away"
before hitting the note-off point?

--> Steve Wahl

-- 
Steve Wahl    steve@...

Fools ignore complexity.  Pragmatists suffer it.
Some can avoid it.  Geniuses remove it.
-- Perlis's Programming Proverb #58, SIGPLAN Notices, Sept.  1982