Cycling 74 » Topic: Transposition real time.

Transposition real time.

viscera — Thu, 22 Sep 2011 02:50:04 +0000

Hi guys! i’m trying to make effects to process my voice, and i want to changes the transpose in real time, but i don’t know wich object do that without latency.. i tried with gizmo but it has a little bit of latency. Hope you can help me!

All the best!

Re: Transposition real time.

n00b_meister — Thu, 22 Sep 2011 07:58:56 +0000

Hi
Besides [gizmo~] I believe there is only one other option: [tapin]/[tapout], for realtime pitch transpose.

I always found gizmo to be a bit ‘grungy’ too, especially at extremes. Anyway, if you search the forum for either “elastic” or “tapout” plus “pitch”, “transpose” etc you should find your way; and look here too:

http://cycling74.com/forums/topic.php?id=28746

http://www.youtube.com/user/dude837#p/u/15/uyzY_ZP54pA

Brendan

ps I was going to suggest my own wonderful granulator, but as yet, it’s not realtime, only buffered pitch manipulation.

Re: Transposition real time.

pid — Thu, 22 Sep 2011 08:03:48 +0000

i presume you mean independent time/pitch stretching/shifting here?

the groove~/gizmo~ combo works very well, but yes, latency incurred because of the fft. such is the reality of physics.

you need a (mainly) granular solution if you want “no” (“less”) latency.

it can be done with clever patching, an excellent example of which has been floating around for years, accessible here:

http://cycling74.com/toolbox/kneppers-granular-stretcher/

i expect max6 will improve matters here, too.

there are also commercial options such as “elastic~” etc externals based on zplane, but it is not all that great tbh.

hth.

Re: Transposition real time.

pid — Thu, 22 Sep 2011 08:05:04 +0000

sorry, missed brenden’s post.

Re: Transposition real time.

MBM — Thu, 22 Sep 2011 08:31:50 +0000

There is an important bug in elastic~ when you record in buffer~ from live (not from a file): it doesn’t work. I wrote to them and they told me that they were going to fix it but they haven’t done yet.

N00b_meister, I would like seeing tour granulator.

Apologizes for my bad english. Best regards!

Re: Transposition real time.

n00b_meister — Thu, 22 Sep 2011 10:26:13 +0000

@MBM

You can judge for yourself if this is indeed “wonderful” or not :-).

The granulator:

http://www.youtube.com/watch?v=QPNBPFAUDoM

And how to build one for yourself:

http://www.youtube.com/watch?v=Z-1nRI4eaKc

Brendan

http://brendan-admi.blogspot.com/

Re: Transposition real time.

MBM — Fri, 23 Sep 2011 01:19:23 +0000

Totally wonderful, it is. Wow. I love it. Could you send it to me? I´d love having it.

Congrats and best regards.

Re: Transposition real time.

n00b_meister — Fri, 23 Sep 2011 07:41:44 +0000

@MBM
Thanks. I really need to turn this into a standalone, as I’ve had several requests for it.

This is the latest version, not the older but prettier one.

Brendan

ps I’d really appreciate if you could give my blog a subscribe please, cheers

Re: Transposition real time.

MBM — Sat, 24 Sep 2011 01:06:13 +0000

Of course, I did suscribe when I saw it. Thank you very much again.

Re: Transposition real time.

viscera — Sun, 25 Sep 2011 06:00:18 +0000

Thanks! amazing stuff… really.

Re: Transposition real time.

Timo Rozendal — Mon, 26 Sep 2011 06:18:28 +0000

I will post a granular pitchshifter external soon (with fairly low latency, depending on the grainsize)

@pid, you said “latency incurred because of the fft. such is the reality of physics.” I recently realised that this latency is not necesarry… you can prevent this latency by building groove and gizmo into 1 external and then processing a lot of frames everytime you jump to a new position. So you trade in latency for a cpu spike :-) Unfortunately this workaround doesn’t work for streaming situations.

Re: Transposition real time.

pid — Mon, 26 Sep 2011 08:52:01 +0000

timo that is cool. i tend to be interested in the streaming situations though!

what i have done in past is put groove~ and gizmo~ pfft~ into the same abstraction, turn it into a poly~ and upsample it to reduce latency. works pretty well with a butterworth lowpass on output. i never need drastic shifting / stretching, so i am usually reasonably happy.

would be interested to ‘see’ your spikes solution and your ‘granular pitchshifter external’ though!

Re: Transposition real time.

Timo Rozendal — Wed, 25 Jan 2012 14:33:31 +0000

here it is: http://www.timorozendal.nl/?p=456
(sorry for the delay :-).. )

Re: Transposition real time.

bennyfromtheblock — Wed, 25 Jan 2012 21:30:40 +0000

Timo,

sweet object, could have done with this a couple of weeks ago ha.