6 Oct
2014
6 Oct
'14
7:31 a.m.
On Saturday, October 04, 2014 03:37:10 PM Len Ovens wrote:
On Sat, 4 Oct 2014, Len Ovens wrote:
You have to remember that many of these vendors have carved out their own
little fiefdoms within AoIP. Many of them have a primary focus: live audio,
broadcast, distributed PA, telephony/VOIP etc. The only real way to integrate
them in large facilities without a common format is to have analog endpoints
that patch the separate types of systems together. That saves money, so when
contractors are putting together bids, and there are vendors that support a
cheap way to integrate layer 3 protocols, they will get advantage over the
ones that don't.
The AES67 looks to provide gateway nodes for the various systems. It has some
inherent limitations, but for for the scope of Linux Audio I think it will be
sufficient for what most people would want to do with it.
I have also seen this thought from every
manufacture or AoIP protocol
vendor:
We welcome an open standard and want to support it. Interoperability is
good for us. (my paraphrase)
I would suggest that no-one wants to be the maker whos stuff works with
other
It could also be that makers would like to offer the in house networking
variety as well as the one universal one instead of offering 5 or 6
different IF cards as some do now.
I would suggest that no-one wants to be the maker whos
stuff works with
other products, but requires extra attention to get set up. This means
extra support which costs money. The aes67 document does suggest some of
the discovery types available:
Bonjour
SAP
Axia Discovery Protocol
Wheatstone WheatnetIP Discovery Protocol
Of these 4 SAP seems to be the one not attached to someone. (it is quite
old as these things go) But all of them seem to be at least somewhat open.
That is, I suspect that these were the choices put up but there was no
agreement. It would not be hard to support all four, but I suspect one of
them will just get used and become standard. Any forum messages I have
read just suggest the dev use SAP as happens.
Bonjour is just the apple branding of zeroconf. It's not really attached to
apple. I think it would offer the most robust solution. In my experience SAP is
very slow to propagate. There's also SLP which almost nobody uses anymore. As
well as UPnP / SSDP, which I hate, but would integrate well with HTML based
control messaging.
-Reuben