[PD] PD] Zen Garden re-implementing the wheel in C++?

Vilson Vieira vilson at void.cc
Mon Apr 19 18:56:40 CEST 2010


Guys,

and how about PD-anywhere? How ZenGarden is influenced by? Isn't them so
similar?

Thanks.

2010/4/18 Frank Barknecht <fbar at footils.org>

> On Sat, Apr 17, 2010 at 04:12:51PM +0200, Matteo Sisti Sette wrote:
> > I don't think it is more ambiguous than the order of execution of this:
> >
> > [adc~]
> >  |
> > [dac~]
> >
> > Either (a) adc-dac or (b) dac-adc.
>
> In Pd it's always (a) because patch cords define the execution order for
> signals. There's no ambiguity, but you cannot do loops this way ("DSP
> loop detected").
>
> > Indeed loops by direct wiring are not allowed in Pd.
> > But to my surprise I find out that loops using send~ and receive~ are.
> > So does a send~-receive~ pair always implicitly have a one-block
> latency???
>
> Not always, but always when you do a loop. When you don't do a loop, you
> can order them so they have zero latency using patchcords/subpatches.
>
> > So my question is which of these is true:
> > A) there is always a one-block latency between a s~ and a corresponding
> r~
>
> No.
>
> > B) there _can_ be a latency, depending on the execution order Pd
> > choses, and you can't know whether there will or won't be.
>
> Yes, there can be a latency, but you can make sure there is none by
> sorting manually using subpatches/patchcords, or you can make sure Pd
> introduces latency by doing a DSP loop. If you try both at the same
> time, you get an error message - the famous "DSP loop detected".
>
> > C) there _can_ be a latency, but if there is no dsp loop on the
> > graph, then you can be sure there won't be any avoidable latency due
> > to execution order.
>
> I'm not sure I understand this sentence, but if you don't have loops,
> you can avoid latency between s~/r~, yes, by sorting.
>
> > Does anybody know the answer?
>
> http://crca.ucsd.edu/~msp/techniques/latest/book-html/node120.html<http://crca.ucsd.edu/%7Emsp/techniques/latest/book-html/node120.html>and
> following.
>
> Ciao
> --
> Frank
>
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-- 
Vilson Vieira

vilson at void.cc

((( http://automata.cc )))

((( http://musa.cc )))
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