I just added the [; pd dsp 0( when starting to creat voices to speed it up and eliminated the 17 voices limit of the patch.
Maybe it's useful for somebody. Ingo > -----Ursprüngliche Nachricht----- > Von: pd-list-boun...@iem.at [mailto:pd-list-boun...@iem.at] Im Auftrag von > Ingo > Gesendet: Donnerstag, 29. September 2011 11:33 > An: 'Roman Haefeli'; 'Ludwig Maes' > Cc: 'Pd List' > Betreff: Re: [PD] Fwd: Variable number of objects? > > Actually, I just tried again to simply copy a couple of voices and it only > took a fraction of a second with a very short dropout - even with the dsp > on. > > I have recently installed Natty instead of Lucid on a new machine. Maybe > it > has something to do with realloc that Mathieu mentioned. > > So it looks like dynamic patching of voices isn't "that" much of a problem > here anymore. It still takes 7-8 seconds to create 16 voices in my case > with > the dsp off (12 with the dsp on) but that's still faster than restarting > the > patch. I would never have checked again if nobody would have mentioned it. > > I have attached a patch that I used for testing. These voices were > receiving > their input with [receive] so no connections were needed. If you are using > wired inlets you will have to dynamically add the connections of course. > > I added a cut & paste at the end because for some reasons the voices > didn't > get initialized correctly. Not sure if this is needed for other > voice-abstractions. > > Ingo > > > > -----Ursprüngliche Nachricht----- > > Von: pd-list-boun...@iem.at [mailto:pd-list-boun...@iem.at] Im Auftrag > von > > Roman Haefeli > > Gesendet: Donnerstag, 29. September 2011 08:36 > > An: Ludwig Maes > > Cc: Pd List > > Betreff: Re: [PD] Fwd: Variable number of objects? > > > > On Wed, 2011-09-28 at 19:29 +0200, Ludwig Maes wrote: > > > > > > > > > ---------- Forwarded message ---------- > > > From: Ludwig Maes <ludwig.m...@gmail.com> > > > Date: 28 September 2011 19:29 > > > Subject: Re: [PD] Variable number of objects? > > > To: Ingo <i...@miamiwave.com> > > > > > > > > > I actually meant more in general, also for non-~ signals (i.e. also > > > control rate .pd patches). I referred to polysynth such that people > > > would see more easily what I meant. Are there really no such > > > primitives? That seems like quite a restriction... > > > > > > How can that take 10 seconds?? I dont see what would cause such a huge > > > overhead, i'd expect an increase in computations & memory though (say > > > from 10 voices to 11: 10% increase in cpu workload & ram dedicated to > > > these voices..., I fail to see what would necessitate a long > > > initialization...) > > > > > > also, how is it done even with the long delays? > > > > > > > > > As I understand it, the whole DSP is recompiled whenever it is changed. > > So, if you have a very large patch (and Ingo seems to be an expert in > > very large patches) and you create another voice, it's easily possible > > to eat up quite some time. > > > > Also, it's probably much slower the first time, if the voice abstraction > > is built of many other abstractions, which need to be read from disk. > > > > But I guess you are right about the increase in CPU workload _after_ the > > DSP graph has been recompiled: A switch from 10 two 11 instances is > > expected to show only an increase of 10% in CPU usage. > > > > It's been said, that often you can gain quite some time while turning > > off DSP during dynamic instantiation. But I guess, this makes only a > > difference when performing several instantiations at the same time. When > > DSP is on, each cycle would cause a complete DSP graph recompilation, > > whereas when DSP is off, it's only recompiled once (after turning it on > > again). > > > > > > > > Roman > > > > > > > > _______________________________________________ > > Pd-list@iem.at mailing list > > UNSUBSCRIBE and account-management -> > > http://lists.puredata.info/listinfo/pd-list
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