[PD] Pd-list Digest, Vol 109, Issue 52
Jack
jack at rybn.org
Thu Apr 17 00:56:52 CEST 2014
OK, all is working now. ;)
But i can't help you, i don't know who is the author of this
abstraction, sorry.
++
Jack
Le 16/04/2014 16:05, Nick Arner a écrit :
> Hi Jack,
>
> Yes, that was my mistake; I've now attached both the patch and the
> abstraction.
>
> Thanks!
> Nick
>
>
> On Wed, Apr 16, 2014 at 6:00 AM, <pd-list-request at iem.at
> <mailto:pd-list-request at iem.at>> wrote:
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> Today's Topics:
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> 1. Re: Pd and RME HDSP alsa vs jack performance (Peter P.)
> 2. Re: PD List (GEM VideoSynth) (Jack)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 15 Apr 2014 18:40:31 -0400
> From: "Peter P." <p8rpp at aol.com <mailto:p8rpp at aol.com>>
> Subject: Re: [PD] Pd and RME HDSP alsa vs jack performance
> To: Federico Galland <federicogalland at gmail.com
> <mailto:federicogalland at gmail.com>>
> Cc: pd-list at iem.at <mailto:pd-list at iem.at>
> Message-ID: <20140415224030.GB8322 at aol.de
> <mailto:20140415224030.GB8322 at aol.de>>
> Content-Type: text/plain; charset=us-ascii
>
> * Federico Galland <federicogalland at gmail.com
> <mailto:federicogalland at gmail.com>> [2014-04-15 17:46]:
> > On Tue, 15 Apr 2014 16:07:03 -0400
> > "Peter P." <p8rpp at aol.com <mailto:p8rpp at aol.com>> wrote:
> >
> > > Hi list,
> > >
> > > following up onto some earlier postings I had made about the
> current
> > > problems running Pd with any buffersize larger(!) than 5 using
> alsa,
> > > the mmap code and an RME HDSP Multiface on Debian Linux, here
> are some
> > > more results from tests I made recently:
> > >
> > > Alsa only works with audiobuf smaller 6, otherwise causing totally
> > > garbled sound. With that short buffer settings it is unusable for
> > > everything more CPU intense than sine test tones though.
> > >
> > > The only way to get Pd to run reliably under some load on my
> box using
> > > the HDSP is to use jack with 256 frames at 2 periods/buffer.
> > >
> > > Now what is weird is that the built in soundcard of my box is
> able to
> > > do the same thing without problems with just 64 frames at 3
> > > periods/buffer in jack.
> > >
> > > Again with the HDSP, once I start adding Gem and let it render a
> > > single geo, I do get many audio dropouts unless I increase jack's
> > > buffers to a minimum 2048 frames at 2 frames/buffer.
> > >
> > > I tested this using two different HDSP cards on two different
> Debian
> > > boxes, using the -rt flag, realtime and non-realtime kernels,
> > > optional callbacks and different sleegrain setting.
> > >
> > > Somehow it seems very sad that one of the best pro
> multichannel sound
> > > cards under Linux seems to be unusable with Pd under Alsa
> reliably.
> > >
> > > I would like to contribute to any ways of improving this
> situation and
> > > desperately hope that someone can comment on my findings.
> > >
> > > thank you!
> > > best, Peter
> > >
> > > _______________________________________________
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> >
> > I guess you have ruled out everything under this wiki
> http://wiki.linuxaudio.org/wiki/system_configuration ?
> Thank you Federico,
> I looked at the page and most suggesstions is stuff I already
> considered.
> >
> > Is the HDSP a PCI interface? If so, pay particular attention to
> the "pci bus latency" part.
> Well it is a ExpressCard interface in my case, and I wonder if that
> qualifies as PCI device. The above pages mentions that PCIe devices
> are not affected by the irq priorities as PCI does.
>
> best, Peter
>
>
>
> ------------------------------
>
> Message: 2
> Date: Wed, 16 Apr 2014 10:55:40 +0200
> From: Jack <jack at rybn.org <mailto:jack at rybn.org>>
> Subject: Re: [PD] PD List (GEM VideoSynth)
> To: Nick Arner <nicholasarner at gmail.com
> <mailto:nicholasarner at gmail.com>>, pd-list <pd-list at iem.at
> <mailto:pd-list at iem.at>>
> Message-ID: <534E458C.6060408 at rybn.org
> <mailto:534E458C.6060408 at rybn.org>>
> Content-Type: text/plain; charset="utf-8"
>
> Hello Nick,
>
> Don't forget to reply to all. That could be interresting for other
> people on this list.
> The document you sent is now a patch (attached).
> But what can we do with it ? There is only a single object
> [video_synth]
> on the canvas. It seems to be an abstraction, right ?
> You have to send us the patch AND the abstraction.
> And where are other objects like [gemwin] ? We are talking about
> Gem, no ?
> ++
>
> Jack
>
>
>
> 06 59 23 94 69 Andr?
>
> Le 16/04/2014 01:23, Nick Arner a ?crit :
> > Hi Jack,
> >
> > Thanks for the reply! I've attached the PD patch (it looks like the
> > attachment went through this time)
> >
> > Thanks,
> > Nick
> >
> > --
> > nickarner.com <http://nickarner.com> <http://nickarner.com>
> >
>
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