18 Jul
2010
18 Jul
'10
6:23 p.m.
On Sun, Jul 18, 2010 at 6:21 AM, Folderol <folderol(a)ukfsn.org> wrote:
This provides an informative overview, even if an advertisement for Q-Lan:
http://www.qscaudio.com/products/network/QSys/Q-LAN_WhitePaper_2009-10.pdf
(authored by the patent-holder on CobraNet: http://bit.ly/9TOyJt (*))
AVB™ is a layer-2 network solution. AVB not only
requires
an uninterrupted layer-2 connection between devices but
it requires that connection be made through special AVB-
capable switches and network equipment.
...
Clock Distribution
Any digital audio and/or video distribution system must
deliver both the media data and its corresponding clock.
Q-LAN accomplishes clock distribution using the IEEE 1588
Precision time protocol (PTP). A variation of PTP is used in
AVB. PTP is under consideration for use in next-generation
video distribution systems standards under development
by SMPTE.
,,,,,,,,,,,,,,,,,,,,,
However, being able to bypass lock-in with an open-source solution,
and cheap consumer hardware, makes the info you posted especially
interesting. These xmos units look quite promising for $149.00:
https://www.xmos.com/products/development-kits/xc-2-ethernet-kit
And (OT) make it possible to cost-efficiently recreate great ideas
originating as burning man projects:
http://petrinis.se/blog/swarm-light/
http://www.youtube.com/watch?v=YqexlHt1Mw0&feature=related
(TODO: large area sonic-holography network using ethernet and hundreds
of these xmos units and consumer "digital tv" i2s-to-class-D amplifier
units and "tv-size" loudspeakrs, all solar powered and
outdoor-situated :-) )
Regarding audio over ethernet -- see also:
http://en.wikipedia.org/wiki/Audio_over_Ethernet
http://en.wikipedia.org/wiki/MADI
http://en.wikipedia.org/wiki/EtherSound
http://en.wikipedia.org/wiki/AES47
Niels
http://nielsmayer.com
(*): http://bit.ly/9TOyJt ==
http://books.google.com/books?id=y0d9VA0lkogC&pg=PA1346&lpg=PA1346&…