On Wed, 26 Oct 2011 11:23:53 -0500 Charles Henry <czhenry@xxxxxxxxx> wrote: > On Wed, Oct 26, 2011 at 11:01 AM, Christoph Kuhr <christoph.kuhr@xxxxxx> wrote: > > > >> I'm unfamiliar with AV bridging--what do you use it for? > > > > AVB is a !!! layer2 !!! ethernet standard for audio and video transport, > > with precise timing synchronization (house clock like with grandmaster clock > > selection), resource reservation and quality of service. > > worstcase latency over 7hops: 2ms > > needs fast eth at least. > > OK, that's a very good standard. Then, it's also addressable, so you > could have multiple audio devices on the same network. It should also > be good for designing large PA systems (over whole buildings, concert > halls, arenas, etc...) using standard networking. > > > the pro audio industry is presenting first products soon, meyersound already > > has it in use in its dmitri. > > harman pro (studer, soundcraft, bss, jbl,...), yamaha will support it, > > biamp, focusrite, audinate, and many many more... > > > > this compatibility would make such an open interface much more interesting, > > i think. > > Where does the implementation belong? It ought to factor into > designing kernel modules + hardware (eth) + fpga code. > > >> While the FPGA's themselves aren't prohibitively expensive, the rapid > >> development boards+software are. > > > > i have a low budget board from xilinx (200$), but will soon switch to > > altera, because the are cheaper boards available (60€)... > > > > bye > > Ck > > I have a Basys2 Xilinix board to get started on. It's decently priced > and has an I2C DAC module (20$ extra) for me to play with, plus some > breadboards for trying out other IC's. At my university, I can take > an FPGA course next spring also. Seems like it's still a long road > ahead before having anything interesting programmed. > > I'd also be interested in other manufacturers--the big issue for me is > figuring out which programming interface works best (on Linux > preferrably!!!). The Xilinx ISE 13.2 needed a little debugging of > shell scripts, so far. Wasn't this very much like what was discussed about a year ago? There is this: http://www.xmos.com/avbl2 The code for this reference design is royalty free, and lots of detail is available. With all the documentation and code available, surely it would be possible to make a linux equivalent to an endpoint. These are BGA devices so not suitable for D.I.Y. builds, but I wonder how much a small production run would be for a board with just the power, Ethernet and I2S headers. -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
