[PD] phase locked loop

Simon Iten itensimon at gmail.com
Fri Mar 10 08:37:59 CET 2023


thanks for your answer.

as a first project i wanted to explore the possibilites in treating the
output of a hexaphonic bass pickup with puredata. a pll oscillator with the
bass string as input (filtered to remove unwanted harmonics) sprang to mind.


other topics i am currently investigating:

-pitch to voltage from the different strings at low latency (difficult with
bass frequencies, i took a gr300 guitar synth approach)
-proper attack detection
-adaptive filtering of the individual strings overtones to remove octave
jumps from the pitch to voltage block



On Fri, 10 Mar 2023, 00:48 Charles Z Henry, <czhenry at gmail.com> wrote:

> Synchronizing oscillators is a good topic and there should be some better
> options with digital alone than with simulations of the analog circuits.
>
> Synchronization in natural systems involves a phase-resetting oscillator.
> The key behavior is the oscillator responds to input events, by adjusting
> its phase by an amount that depends on the current state of the
> oscillator.  This is enough to produce synchronization within a small range
> of nearby frequencies, by itself, but adjusting frequency is also possible.
>
> What did you have in mind?  Any specific behavior it needs to have?
>
>
>
>
>
> On Tue, Mar 7, 2023, 4:01 PM Simon Iten <itensimon at gmail.com> wrote:
>
>> hi list,
>>
>> does somebody have a patched version of a PLL (phase locked loop) in PD?
>> or building blocks of it...
>>
>> cheers
>>
>>
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>
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