Send Pd-list mailing list submissions to
pd-list@iem.at
To subscribe or unsubscribe via the World Wide Web, visit
http://lists.puredata.info/listinfo/pd-list
or, via email, send a message with subject or body 'help' to
pd-list-request@iem.at
You can reach the person managing the list at
pd-list-owner@iem.at
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Pd-list digest..."
Today's Topics:
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@aol.com>
Subject: Re: [PD] Pd and RME HDSP alsa vs jack performance
To: Federico Galland <federicogalland@gmail.com>
Cc: pd-list@iem.at
Message-ID: <20140415224030.GB8322@aol.de>
Content-Type: text/plain; charset=us-ascii
* Federico Galland <federicogalland@gmail.com> [2014-04-15 17:46]:
> On Tue, 15 Apr 2014 16:07:03 -0400
> "Peter P." <p8rpp@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
> >
> > _______________________________________________
> > Pd-list@iem.at mailing list
> > UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
>
> 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@rybn.org>
Subject: Re: [PD] PD List (GEM VideoSynth)
To: Nick Arner <nicholasarner@gmail.com>, pd-list <pd-list@iem.at>
Message-ID: <534E458C.6060408@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>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.puredata.info/pipermail/pd-list/attachments/20140416/f4c72d0c/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: video_synthesis.pd
Type: application/puredata
Size: 55 bytes
Desc: not available
URL: <http://lists.puredata.info/pipermail/pd-list/attachments/20140416/f4c72d0c/attachment-0001.bin>
------------------------------
_______________________________________________
Pd-list mailing list
Pd-list@iem.at
to manage your subscription (including un-subscription) see
http://lists.puredata.info/listinfo/pd-list
End of Pd-list Digest, Vol 109, Issue 52
****************************************