[sdiy] Mopho modulation DAC configuration, update rate, etc

[Dave Manley]

OT: The sustain is quite long as there is no damping, and the 
sympathetic resonance is incredible.  The design of the instrument 
effectively has one bridge per group of three strings, and each bridge 
is mounted directly on the sound board.  There is a lot of energy 
transmitted from a struck string to nearby strings.  When it is right, 
it sounds pretty amazing.  It would take a lot of cpu cycles to model. 
:-) Hopefully in a day or two the instrument will settle in, and hold a 
tune.

A little more on-topic: The Mopho analysis is a work in progress as I 
have time.  I posted some results last night - look for the original 
post with this title.  I started working from the dsPIC towards the DAC 
and CEM.

-Dave

cheater cheater wrote:
> Haha yeah! There is little that can beat the sound of strings coming
> to full unison after hours or days of work. The rumble of a dischord
> slowly converging, the beats slowing down, and if you have luck, you
> arrive at a perfect sound where the beats are longer than the
> instrument can sustain for. Or maybe you'll have to keep looking
> because you adjusted too far. I still remember the first time I tuned
> a violin.
> 
> David, didn't you make some sort of analysis of the Mopho? What did
> you come up with?
> 
> D.
> 
> On Wed, Feb 3, 2010 at 22:23, David G. Dixon <dixon at interchange.ubc.ca> wrote:
>>> It's too late to look at the encoder scan rate :-) , I spent the evening
>>> trying to tune a Hammered Dulcimer. 31 x 3 = 93 separate strings.  It
>>> had never been tuned, and the strings are stretching like crazy.  Three
>>> passes through, and it is still not staying in tune, even with
>>> stretching the strings between each tuning pass - you think calibrating
>>> a VCO is a pain?
>> That reminds me of the hours of fun I used to have tuning a harpsichord (183
>> strings on that one!).  Now THAT was analog!