[sdiy] Techniques for Multiplying MIDI Clock frequency?

[Spiros Makris]

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.


On Sun, 19 Dec 2021 at 13:53, Adam Inglis (synthDIY) <synthdiy at adambaby.com>
wrote:

>
>
> On 19 Dec 2021, at 20:47, Gordonjcp <gordonjcp at gjcp.net> wrote:
>
> So I guess the MPC60 must use some sort of software PLL to evenly double
> up the incoming clock pulses to get 48ppcn clocks.  The Roland W30 has
> something like 192ppcn and also responds to external MIDI clock, so it must
> do some very clever measurement - or, perhaps, when you get that fine you
> don't really notice a bit of wibbly-wobbly clocking.
>
>
>
> I’ve not used a W30, but I understand it’s sequencer runs the standard
> Roland “Super MRC” software that runs on the MC-300, MC-500 and MC-50 midi
> sequencers, and that runs at 96ppqn, not 192.
> Also swing or shuffle aren’t actually even mentioned in the manual, and
> there is no specific setting for this, you have to do a little trick with
> the quantize function.
> Another problem is that various companies don’t stick to a standard when
> it comes to using the “percent” terminology.
> Roger Linn explains it thus:
>
> "My implementation of swing has always been very simple: I merely delay
> the second 16th note within each 8th note. In other words, I delay all the
> even-numbered 16th notes within the beat (2, 4, 6, 8, etc.) In my products
> I describe the swing amount in terms of the ratio of time duration between
> the first and second 16th notes within each 8th note. For example, 50% is
> no swing, meaning that both 16th notes within each 8th note are given equal
> timing. And 66% means perfect triplet swing, meaning that the first 16th
> note of each pair gets 2/3 of the time, and the second 16th note gets 1/3,
> so the second 16th note falls on a perfect 8th note triplet."
>
> but Cubase has another method altogether!!
>
> Gordon you said 67% sounds “lumpy”… but that’s just triplets! It shouldn’t
> sound lumpy… unless not everyone is in sync!
>
> I take a look at some of this stuff here
> https://mezzoauto.blogspot.com/2017/08/swing-conversion.html
>
> WRT to Spiros original enquiry, I don’t understand why you need to
> drastically change your clock PPQN numbers in order to experiment with
> polymeter rhythms… but then, I’m not using modular gear.
> What you definitely do need is rock solid clocking at whatever your chosen
> resolution, so that any subtleties like the push and pull of swing aren’t
> lost in the jitter.
>
> 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
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20211219/3c56676a/attachment.htm>