Carlos,
for audio over Eth/wireless on ARM I suggest you to give a read to my recent papers at:
http://a3lab.dii.univpm.it/research/wemust

Those didn't involve Fons' zita-[nj|jn]bridge, which has recently been released and I will probably use in next refinements of the research outcome, being tiny and functional.

So far my experience with ARM cores is that you must be careful with Jack. Old platforms such as Xscale will require you effort for compiling and working fine. And btw I suggest you to go directly with 2.6 kernel for real-time audio. Also, I expect it to be tight as a platform for running Jack (how much memory do you have?) especially at low period sizes (the CPU risks to be overwhelmed with interrupts).

Definetely Jack has a lot of features that are important even for this simple task but I'm wondering if there is any gain in embedding only those needed in a library and use it instead of the whole JACK.

BTW: a nice paper you may want to read:
Reuter, "Case Study: Building an Out Of The Box Raspberry Pi Modular Synthesizer", LAC 2014

Leonardo

On 26/10/2014 13:00, linux-audio-user-request@lists.linuxaudio.org wrote:

In practice that is not very likely to happen, the reason
> >being that interfacing to Jack is so much more easy than
> >writing an ALSA driver. Also, passing via Jack does not
> >add any latency, and in most cases users will want the
> >flexibility it provides.

>
>thanks for the answer, I was expecting this, but hadn't measures the
>difference between the jack client and alsa driver.
>So now it looks like I need to learn how to cross compile jack for various
>ARM devices to have it on the lightweight clients :/
>
>Rapha?l
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>Linux-audio-user mailing list
>Linux-audio-user@lists.linuxaudio.org
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>

I've thought about a similar idea sometime in the past: A distributed audio
network with thin clients/raspberrys for a home studio or distributed via
some network. I'd be interested in following whatever progress you make.

About that of "distributed band" I red a little about programs to jam via
internet: Netjack, Ninjam, Midikit.