[sdiy] Keyboard scanning rate

Scott Gravenhorst music.maker at gte.net
Wed Nov 25 22:07:31 CET 2009


Neil Johnson <neil.johnson97 at ntlworld.com> wrote:
>Hi,
>
>Ullrich Peter wrote:
>> In the Korg Poly800 I measured around 950Hz.
>
>Ok, so a little over 1ms plus a little slop per scan.
>
>At 1ms scan time I can't play fast/hard enough to reach the maximum  
>velocity value so I may go with that for now, with the option of  
>going up to double that rate.
>
>I know there are a few people on the list who have designed and built  
>their own scanned digital keyboards, so I'm hoping for some differing  
>opinions.

I would run it as fast as it will go and still perform correctly.  I see no
advantage to a slower scan rate.  Just my opinion...



-- ScottG
________________________________________________________________________
-- Scott Gravenhorst
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