[PD] how to change bp~ frequency at sample rate?

[Andy Farnell]

On Sat, 8 Oct 2011 20:39:37 +0200
Menno van der Woude <mennowo at gmail.com> wrote:

> So far, [vcf~] has done a great job, thanks! Being able to also change
> resonance at sample rate would be nice. At this point, building an
> object like that is a bit beyond my level of expertise.


IIRC the [moog~] object has audio rate control of all its parameters.


> 
> I am wondering, is there a distortion object around that can be
> controlled at sample rate? Both [dist~] and [overdrive~] give many
> clicks when real time control moves too fast.

Many object combinations can achieve this. [max~] and [min~]
provide simple floor and ceiling clips adjustable at audio rate.
More sophisticated methods are to use a [*~] scaling before
a [tanh~] or [sin~] function, or to index a [tabread4~] 
containing a transfer you prepared. In this regard have a look at
making Chebyshev function tables which have interesting properties
when used for distortion.


> Browsing the extra folder of pd-extended, I did not come accross other
> distortion or similar objects. Which also makes me wonder: is there a
> way other than google or browsing the pd files, to find relevant
> objects?


Yes. 

1) Use the help browser by category
2) Use the resources on puredata.info
3) Manually explore the /extra or /extern folder in your pd install
4) ++ more ++ 

> 
> Bye, menno
> 
> On Sat, Sep 3, 2011 at 10:37 AM, Andy Farnell
> <padawan12 at obiwannabe.co.uk> wrote:
> >
> >
> > Yes its useful to have signal control over resonance too
> > although less common to need it. An example is if you make
> > a string or drum skin model with parallel resonances and you
> > want to dampen it when it's sounding.
> >
> > Its been done before using [rpole~] and [rzero~] objects,
> > but IIRC was unstable when sweeping the resonance and
> > cutoff simultaneously. Filter topologies, with
> > the same poles and zeros but in different orders, will behave
> > differently when you vary the coefficients, so testing
> > with envelopes on both controls should be done.
> >
> >
> > On Fri, 2 Sep 2011 16:49:14 -0400 (EDT)
> > Mathieu Bouchard <matju at artengine.ca> wrote:
> >
> >> On Fri, 2 Sep 2011, Roman Haefeli wrote:
> >>
> >> > According to its helpfile, [vcf~ ] is the same as [bp~ ], but with a
> >> > voltage controlled aka signal rate inlet for frequency.
> >>
> >> Now let's say that I want to have all three inlets as signals.
> >>
> >> Is there an abstraction for doing that ?
> >>
> >> I just made part of one, by looking at
> >> http://crca.ucsd.edu/~msp/techniques/latest/book-html/node143.html
> >>
> >> But I'm not done yet. Anyone interested ?
> >>
> >>   _______________________________________________________________________
> >> | Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal, QC
> >
> >
> > --
> > Andy Farnell <padawan12 at obiwannabe.co.uk>
> >
> > _______________________________________________
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> >
> 
> 
> 
> -- 
> ---
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-- 
Andy Farnell <padawan12 at obiwannabe.co.uk>