> On Wed, 26 Oct 2011 11:23:53 -0500
> Charles Henry wrote:
>
>> On Wed, Oct 26, 2011 at 11:01 AM, Christoph Kuhr
>> 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.
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