[PD] Purpose of sig~

[Andy Farnell]

Though on the downside... a [sig~] is
more expensive. 

The good part about implicit conversion is
you have to do it once and the object can
retain that state. 

cheers

a.

On Wed, 3 Nov 2010 16:20:57 +0000
Jamie Bullock <jamie at postlude.co.uk> wrote:

> 
> On 3 Nov 2010, at 16:14, Andy Farnell wrote:
> 
> > There are some uses of [sig~] which are not immediately
> > obvious but turn out to be desirable. By definition it
> > is useful any place you want a message domain value converted
> > to a signal, without any further ado. Without it, relying
> > only on implicit conversion you might never have access to
> > a signal except by a degenerate idiom like
> > 
> > [$1(
> > |
> > [line~]
> > 
> > 
> > Crucially, [sig~] can be given a creation parameter, as in
> > [sig~ 1], and will not need any messy initialisation 
> > like using a [loadbang] in order to obtain a signal 
> > constant immediately. 
> > 
> > Why might you want a signal constant? Perhaps for
> > a relation like (1 - x), useful in panning, crossfading,
> > or (1 / x) common in waveshaping.
> > 
> > Matju raises a question over DSP on/off. I have encountered
> > problems relying on implicit right inlet conversion 
> > with deep abstractions, so from practical experience 
> > it seems safer to use [sig~] in these circumsatnces.
> > 
> > It also make code more readable to make important
> > message/signal distinctions explicit.
> > 
> > 
> > 
> 
> Thanks Andy. So:
> 
> [sig~ 1] 
> |
> [tabosc4~ foo]
> 
> avoids:
> 
> [loadbang]
> |
> |1(
> |
> [tabosc4~ foo]
> 
> This is reason enough for me.
> 
> best,
> 
> Jamie
> 
> 
> > 
> > 
> > On Wed, 3 Nov 2010 14:46:51 +0000
> > Jamie Bullock <jamie at postlude.co.uk> wrote:
> > 
> >> 
> >> Hi all,
> >> 
> >> This is more of philosophical question than anything else. I'm curious to know why [sig~] hasn't been designed out of Pd. Why not have implicit control -> signal conversion everywhere it is possible?
> >> 
> >> For example why not allow this?
> >> 
> >> |2(	|3(
> >> |	|
> >> [+~ ]
> >> 
> >> Jamie
> >> 
> >> --
> >> http://www.jamiebullock.com
> >> 
> >> 
> >> 
> >> 
> >> _______________________________________________
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> > 
> > 
> > -- 
> > Andy Farnell <padawan12 at obiwannabe.co.uk>
> > 
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> 


-- 
Andy Farnell <padawan12 at obiwannabe.co.uk>