[sdiy] Techniques for Multiplying MIDI Clock frequency?

Benjamin Tremblay btremblay at me.com
Mon Dec 20 04:50:17 CET 2021

To me the design constraints of a MIDI clock multiplier are both tempo and accuracy.  Just achieving accuracy is enough to keep my up at night.
Obviously the very worst thing that could happen was you lose any clock pulses.
So you must get and propagate all the original pulses, because one missing pulse can ruin your whole day.
Then you must ensure that if your receiving machine needs 2 pulses for every pulse received, it gets exactly one extra pulse per pulse.

Because, I want the controlling drum machine and following drum machine to be in lock step with no audible delay between beats. I don’t want a machine that guesses the tempo and tries to keep up. I want 2 machines that are literally locked together.

Then, and that’s a tall request, you can worry about whether tempo changes are natural and divisible for polyrhythms etc. 

> On Dec 19, 2021, at 9:36 PM, Adam Inglis (synthDIY) <synthdiy at adambaby.com> wrote:
>> On 19 Dec 2021, at 22:06, Spiros Makris <spirosmakris92 at gmail.com> wrote:
>> You don't *need* this kind of resolution to play around polyrhythms and such, but musicians tend to come up with all sorts of crazy feature requests. This particular one was the result of a discussion with a percussionist, who has some experience in Indian percussion.
>> His approach, which I found rather interesting, is that you should have the option of defining how many notes will be played within a "beat", and let you make the "beat" equal to any of the rhythm values. So, for example, things like 3 notes within a quarter or 5 within a dotted eight would somehow be legit settings. Add 7 more channels to this and you have some proper madness to play with.
>> Do I understand how he'd make music with this? Not really. But I think it's a very interesting challenge from a technical standpoint.
> Agree, it does sound interesting.
> Certainly there is potential for “proper madness”  !!!   … for it to become music it will need careful control!
> I’ve found when messing around, not so much with polyrhythms, but certainly with ‘odd’ time signatures, that it takes a good musician to show how it all makes sense. 
> Play around with 7/8 on a drum machine and instrument of your choice, hmmm, hard to get a groove going… then you hear what Brubeck did with it, and you go "ah ha, now I get it!”
> A
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy
> Selling or trading? Use marketplace at synth-diy.org

More information about the Synth-diy mailing list