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PLL in Max or Pd
MUFF WIGGLER Forum Index -> Music Software  
Author PLL in Max or Pd
arthurgrimley
Hi everyone,

I'm interested in creating a Phase Locked Loop (PLL) in MaxMSP or Pd - this kind of thing

https://www.muffwiggler.com/forum/viewtopic.php?t=53142&highlight=pll

but while I can get close to the sound with [rampsmooth] or [line], can anyone offer advice as to how I could implement something like an actual PLL mechanism (running at audio rates)? A search of the Max and Pd forums doesn't seem to turn up much useful.

Thanks
CJ Miller
I'd never really thought about it before. I guess I'd try looking at patches for pitch-tracking input, and repurpose them for internal signals. If you can play with the tracking parameters it might function in a similar way to a PLL.
felix le chat
arthurgrimley wrote:

but while I can get close to the sound with [rampsmooth] or [line], can anyone offer advice as to how I could implement something like an actual PLL mechanism (running at audio rates)?

As far as I remember, the Doepfer PLL manual explains how the components are connected. It should be possible to do this in software, at audio rate.

The difficult part is you cannot make zero-latency feedback paths in software. But maybe you can simply add a single sample delay line in each feedback loop and it will sound similar.

Cheers
Flc
skrasms
This thread motivated me to make a PLL with the gen~ object in Max 6. I posted the results on the Cycling74 forum here:
http://cycling74.com/forums/topic.php?id=38452
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