[PD] Working RPI Soundcards (was raspberry pi user experience)

[Alexandre Torres Porres]

> No, as nothing of current Pd can be hardware accelerated.
> A fast GPU would only provide a benefit for Gem.

Therefore, you can improve the performance of GEM on a RPI with an external
video card, cool.

But so just to be cristal clear then, Audio Cards do not improve CPU at
all, right? But they can improve latency issues at least, can't they?

Sticking to the Pi issue, since it is so economic in CPU power, what are
the efficiency benefits from audio cards more than just number of inputs
and outputs?

> try to make pd and pd-gui talk less to each other
 > (for instance, by reducing the update rates for your GUIs).

and how can you do that? :)

thanks


2013/2/1 Roman Haefeli <reduzent at gmail.com>

> On Fre, 2013-02-01 at 04:14 -0200, Alexandre Torres Porres wrote:
> > by the way, since I've been abusing so much of the GUI to build me
> > fancy interfaces, I can see how easily it can choke on its update and
> > flood the CPU.
> >
> >
> > Now, could an external video card help on that? What is the issue?
>
> Since the GUI process (called pd-gui) is computed on the CPU, a
> dedicated video card wouldn't help.
>
> > I'm using a macbook air and I see that the video processor is built-in
> > the CPU or something like that, hence no proper videocard. I figure
> > the RPI has gotta be something like that.
> >
> >
> > So, does it mean a macbook pro or other laptop / computer with some
> > badass video processor or card can run the patches better even with
> > same clock?
>
> No, as nothing of current Pd can be hardware accelerated. A fast GPU
> would only provide a benefit for Gem. However, pd and pd-gui are two
> separate processes and they run on separate cores, if there is more than
> one. Most laptops (netbooks not included) have at least two cores
> already. This means on many laptops, pd-gui does not eat away CPU power
> from the pd process.
>
> Beware that there is also another bottleneck: the communication between
> pd and pd-gui. A possible cause for audio-dropouts is the saturation of
> the TCP link between the two as it might be triggered by frequent array
> updates or similar. If you experience troubles, try to make pd and
> pd-gui talk less to each other (for instance, by reducing the update
> rates for your GUIs).
>
> Roman
>
>
>
>
> _______________________________________________
> Pd-list at iem.at mailing list
> UNSUBSCRIBE and account-management ->
> http://lists.puredata.info/listinfo/pd-list
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.puredata.info/pipermail/pd-list/attachments/20130201/2f305637/attachment.htm>