<div dir="ltr">Hi Jack, <div><br></div><div>Yes, that was my mistake; I've now attached both the patch and the abstraction. </div><div><br></div><div>Thanks!<br>Nick</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">
On Wed, Apr 16, 2014 at 6:00 AM, <span dir="ltr"><<a href="mailto:pd-list-request@iem.at" target="_blank">pd-list-request@iem.at</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Today's Topics:<br>
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1. Re: Pd and RME HDSP alsa vs jack performance (Peter P.)<br>
2. Re: PD List (GEM VideoSynth) (Jack)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Tue, 15 Apr 2014 18:40:31 -0400<br>
From: "Peter P." <<a href="mailto:p8rpp@aol.com">p8rpp@aol.com</a>><br>
Subject: Re: [PD] Pd and RME HDSP alsa vs jack performance<br>
To: Federico Galland <<a href="mailto:federicogalland@gmail.com">federicogalland@gmail.com</a>><br>
Cc: <a href="mailto:pd-list@iem.at">pd-list@iem.at</a><br>
Message-ID: <<a href="mailto:20140415224030.GB8322@aol.de">20140415224030.GB8322@aol.de</a>><br>
Content-Type: text/plain; charset=us-ascii<br>
<br>
* Federico Galland <<a href="mailto:federicogalland@gmail.com">federicogalland@gmail.com</a>> [2014-04-15 17:46]:<br>
> On Tue, 15 Apr 2014 16:07:03 -0400<br>
> "Peter P." <<a href="mailto:p8rpp@aol.com">p8rpp@aol.com</a>> wrote:<br>
><br>
> > Hi list,<br>
> ><br>
> > following up onto some earlier postings I had made about the current<br>
> > problems running Pd with any buffersize larger(!) than 5 using alsa,<br>
> > the mmap code and an RME HDSP Multiface on Debian Linux, here are some<br>
> > more results from tests I made recently:<br>
> ><br>
> > Alsa only works with audiobuf smaller 6, otherwise causing totally<br>
> > garbled sound. With that short buffer settings it is unusable for<br>
> > everything more CPU intense than sine test tones though.<br>
> ><br>
> > The only way to get Pd to run reliably under some load on my box using<br>
> > the HDSP is to use jack with 256 frames at 2 periods/buffer.<br>
> ><br>
> > Now what is weird is that the built in soundcard of my box is able to<br>
> > do the same thing without problems with just 64 frames at 3<br>
> > periods/buffer in jack.<br>
> ><br>
> > Again with the HDSP, once I start adding Gem and let it render a<br>
> > single geo, I do get many audio dropouts unless I increase jack's<br>
> > buffers to a minimum 2048 frames at 2 frames/buffer.<br>
> ><br>
> > I tested this using two different HDSP cards on two different Debian<br>
> > boxes, using the -rt flag, realtime and non-realtime kernels,<br>
> > optional callbacks and different sleegrain setting.<br>
> ><br>
> > Somehow it seems very sad that one of the best pro multichannel sound<br>
> > cards under Linux seems to be unusable with Pd under Alsa reliably.<br>
> ><br>
> > I would like to contribute to any ways of improving this situation and<br>
> > desperately hope that someone can comment on my findings.<br>
> ><br>
> > thank you!<br>
> > best, Peter<br>
> ><br>
> > _______________________________________________<br>
> > <a href="mailto:Pd-list@iem.at">Pd-list@iem.at</a> mailing list<br>
> > UNSUBSCRIBE and account-management -> <a href="http://lists.puredata.info/listinfo/pd-list" target="_blank">http://lists.puredata.info/listinfo/pd-list</a><br>
><br>
> I guess you have ruled out everything under this wiki <a href="http://wiki.linuxaudio.org/wiki/system_configuration" target="_blank">http://wiki.linuxaudio.org/wiki/system_configuration</a> ?<br>
Thank you Federico,<br>
I looked at the page and most suggesstions is stuff I already<br>
considered.<br>
><br>
> Is the HDSP a PCI interface? If so, pay particular attention to the "pci bus latency" part.<br>
Well it is a ExpressCard interface in my case, and I wonder if that<br>
qualifies as PCI device. The above pages mentions that PCIe devices<br>
are not affected by the irq priorities as PCI does.<br>
<br>
best, Peter<br>
<br>
<br>
<br>
------------------------------<br>
<br>
Message: 2<br>
Date: Wed, 16 Apr 2014 10:55:40 +0200<br>
From: Jack <<a href="mailto:jack@rybn.org">jack@rybn.org</a>><br>
Subject: Re: [PD] PD List (GEM VideoSynth)<br>
To: Nick Arner <<a href="mailto:nicholasarner@gmail.com">nicholasarner@gmail.com</a>>, pd-list <<a href="mailto:pd-list@iem.at">pd-list@iem.at</a>><br>
Message-ID: <<a href="mailto:534E458C.6060408@rybn.org">534E458C.6060408@rybn.org</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Hello Nick,<br>
<br>
Don't forget to reply to all. That could be interresting for other<br>
people on this list.<br>
The document you sent is now a patch (attached).<br>
But what can we do with it ? There is only a single object [video_synth]<br>
on the canvas. It seems to be an abstraction, right ?<br>
You have to send us the patch AND the abstraction.<br>
And where are other objects like [gemwin] ? We are talking about Gem, no ?<br>
++<br>
<br>
Jack<br>
<br>
<br>
<br>
06 59 23 94 69 Andr?<br>
<br>
Le 16/04/2014 01:23, Nick Arner a ?crit :<br>
> Hi Jack,<br>
><br>
> Thanks for the reply! I've attached the PD patch (it looks like the<br>
> attachment went through this time)<br>
><br>
> Thanks,<br>
> Nick<br>
><br>
> --<br>
> <a href="http://nickarner.com" target="_blank">nickarner.com</a> <<a href="http://nickarner.com" target="_blank">http://nickarner.com</a>><br>
><br>
<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr"><font size="4"><font color="#000000"><a href="http://nickarner.com" target="_blank">nickarner.com</a></font><br></font><br></div>
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