[LAD] Embedded linux board

Jon Smirl jonsmirl at gmail.com
Mon Aug 20 17:38:45 UTC 2007

On 8/20/07, Florian Schmidt <mista.tapas at gmx.net> wrote:
> On Monday 20 August 2007, Steve Harris wrote:
> > > I did a bit more research and barring the size of the board I'd say
> > > something like the Epia 5000
> > > http://www.via.com.tw/en/products/mainboards/motherboards.jsp?
> > > motherboard_id=21
> > > should be a very good choice. Not too complex to finish, onboard
> > > audio,fanless and such. Even a pci slot ;). Quite cheap, around €90.
> > > No idea how capable the soundcard is, but I believe it's tested in
> > > low latency situations atleast?
> >
> > I think the ones I worked with might have been EPIA 10000s (1GHz VIA
> > C3), and I did run JACK on them for kicks. I think it worked but I
> > don't remember how it was though, and I didn't test the card on any
> > decent monitors. The onboard sound is generic AC-97 stuff. Some of
> > the models have slow CPUs and very slow FPUs, so beware of those.
> >
> > I was using them for an audio-less video installation, so the testing
> > was just for curiosity.
> I think i'll stick with the board i originally posted the link to [even if it
> doesn't work well enough i have only wasted 50 euros which isn't that much]..
> I will attach a USB audio interface for testing purposes and if the
> performance is sufficient for me, i'll look into attaching an audio codec to
> its ISP bus.

It is somewhat computationally intensive to drive USB audio. For
example the IPX425 used in the NSLU2 can just barely do it. USB audio
runs at 48K and most music is 44.1K, you need to resample it. Make
sure the board has DMA support for the USB channel or it is never
going to work.

> BTW: i don't need jack to run.. I'm not even sure it can run at all on that
> board. All i need will be a single application which will feed audio into
> LADSPA plugins.. Jack would be overkill..
> Regards,
> Flo
> --
> Palimm Palimm!
> http://tapas.affenbande.org
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Jon Smirl
jonsmirl at gmail.com

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