[PD-dev] run-up to release 0.43

[IOhannes m zmölnig]

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On 08/20/2010 08:30 AM, Jonathan Wilkes wrote:
> > (And I think initbang
>> and closebang are totally different animals...)
> 
> They definitely are very different.
> 

sure.
i implemented both while i was at it :-)

> As for [initbang] - my only use has been for making abstractions that 
> can spawn a variable number of inlets/outlets.  That's the only way 
> I've used it and the only way I've ever seen it used-- if there are 
> other uses maybe someone else on this list can give an example.

i hae used [initbang] a lot for dynamic patching (where [loadbang] is
not triggered).

e.g. i have used both [initbang] and [closebang] together in a system
that implements click-free reinstantiation of objects:
when you have several abstractions generating audio, and you edit and
save one of them, all of the sister abs are recreated, which easily
generates dropouts because of 2 reasons
- - the dsp-chain has to be recalculated
- - the phase of the a vanishing object is different from that of the
newly created replacement.

the dsp-chain recalculation can be made click-free by simply using
faster processors (there are other ways (or rather: ways to reduce the
time it takes for recalculation) as well, but i won't open this can of
worms now)

the phase however, is a real problem which cannot be easily solved
(unless Pd does automatic fade in/out for created/deleted objects
automatically, which is probably not such a good idea)

the way i solved it, was sending the output of the abstraction to a
summing bus (where [initbang] would create a fade in), and if the
abstraction got deleted (detected by [closebang]!) it would fade out.

this has proven to work well in live-coding performances on an eee901
(e.g. a not so super-fast processor), without a rather minimal change in
the core of Pd (only [initbang] and [closebang] are required)


mfgfst
IOhannes
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