[sdiy] midi clock

[patchell]

    This is something I just drew up.  I would want to run it through a logic
simulator (Logic simulators are for Wimps and Bedwetters, but it does save time)
before I would call it complete.  It turned out a lot more complicated than it
sounded.  A Pic or AVR solution would probably be better.

http://www.silcom.com/~patchell/synthmodulesII/200-1028.pdf

    Anyway, the clock goes into the phone jack.  A toggle switch selects the edge
polarity.  The midi event will be transmitted either on the positive or negative
edge....a PLD solution would be a little tidier as well probably...

Sven Windisch wrote:

> On Sun, 1 Dec 2002, patchell wrote:
>
> >     Let me repeat what I think you want.  You want a clock source for an
> > Analog Sequencer, like a VCO,  that will also output a Midi Clock Event on
> > the active edge of the clock....
>
> i'm not sure if we speak about the same by calling it analog sequencer. i
> mean something like this: [1]
>
> and i imagine on more feature: for being compatible to midi-hardware owned
> by others (i do not own such equipment, only true analog ;-) at a session
> or sth. similar it would be nice to be able to recieve the midi-clock from
> others. so it could be something like a midi-clock-to-cv-clock-converter
> and a midi-clock-creator merged together. only if this isn't too
> complicated. if it would make a mess i could simply say "sorry, guys. i
> am the clock", too ;-)
>
> >
> >     It would be pretty easy to cook up some VHDL code for a 22v10 that would
> > do this....also, I imagine it would be easy to write some code for a PIC to
> > do this as well.  If nobody can come up with anything else, I would be
> > willing to cook up the VHDL code for a 22v10 (this is a Programmable Logic
> > chip) and a schematic.  It would work with any VCO.
>
> would be really nice.
>
> so long...
> sven
>
> [1]
> http://machines.hyperreal.org/categories/DIY/sequencer/sneppe-sequencer/

--
 -Jim
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