[RDD] Switching main output between cards

Lorne Tyndale ltyndale at tyndaleweb.com
Sun Jun 28 16:50:37 EDT 2015


The main reason that I see for being able to change things up on the fly
relate to situations I've directly encountered when troubleshooting /
fixing gear.

Consider: Rivendell is set to alternate playout between Channel A and
Channel B.  The console in your on-air studio develops a problem with
one of the channel modules that Rivendell uses.  If you happen to have a
modular console and if this were a feature you could run a macro that
tells Rivendell to only output to Channel A (or Channel B as
appropriate), then once there is nothing going through the channel that
has the difficulty, pop that channel out, repair it, and pop it back in
(or if you happen to have a spare channel module, pop your spare in). 
Then tell Rivendell to go back to the A to B alternating sequence.  The
system will never miss a beat, no need to interrupt RDAirplay to fix
your console.

I've actually done this a number of times on another automation system
(I won't mention which one) that has the ability to change the channel
playout sequence on the fly.  It isn't one of those features that needs
to be used a lot, but when it is needed it sure is nice to have.

I agree that it is entirely possible (and quite simple) to do this type
of changeup with Jack.

Lorne Tyndale

> or put a switcher on the output of Rivendell, and switch that...
> I AM CURIOUS AS TO WHY you want to switch the outputs, though... 
>      On Sunday, June 28, 2015 9:52 AM, Alessio Elmi <alessio_elmi at hotmail.com> wrote:
>  The only workaround I found is using Jack for this (I need to test it yet though), but it's a solution I don't like too much...
> @Fred can you confirm there's no way of doing it inside Rivendell? In this case I think it would be a very appreciated implementation! :-)
> Something like you create a list of "Virtual Audio Devices" to be interposed between Rivendell modules and physical audio devices, each of them with a number of virtual inputs and virtual outputs. Then you can feed Virtual devs with Physical devs and vice-versa, something like jack connections...
> I suspect it's a big effort :-) ...just a wish!
> Il giorno dom 28 giu 2015 alle ore 01:49 Lorne Tyndale <ltyndale at tyndaleweb.com> ha scritto:
> Hi,
> At present there is no way that I am aware of - on the fly - of
> switching the audio output or input from one card / port to another.
> You can change the audio outputs / inputs in rdadmin --> Manage hosts,
> however to make the new settings take effect it requires exiting and
> restarting rdairplay (or which ever module you're using).
> The Local Audio Adapter in the matrix is there to allow you to grab the
> LineIN off an audio card and route it to an output on the same audio
> card via an RML command.  The purpose of this would be - as an example -
> to provide a method of routing satellite audio hooked into a line in and
> have it put out to an audio output.  More information can be found here:
> http://rivendell.tryphon.org/wiki/How_do_I_make_Rivendell_play_Audio_from_the_%22Line_In%22_of_the_Sound_Card_on_the_air%3F
> Lorne Tyndale
> > -------- Original Message --------
> > Subject: [RDD] Switching main output between cards
> > From: Alessio Elmi <alessio_elmi at hotmail.com>
> > Date: Sat, June 27, 2015 12:39 pm
> > To: User discussion about the Rivendell Radio Automation System
> > <rivendell-dev at caspian.paravelsystems.com>
> >
> >
> > Sorry if this is a topic already discussed or explained somewhere around
> > but I couldn't find an exhaustive guide on it, so maybe you could point me
> > to the right direction.
> > What I need to to is having the ability to switch the output card (or maybe
> > just the port) in automatic at some point. In poor words: "Ok from now on
> > route RDAirPlay to Card 1 instead of Card 0, or - equivalently - from Card
> > 0 port 0 to Card 0 port 1".
> > I think that matrix/switcher could help in somehow. But how? I tried to
> > "clic randomly" to try things out but I couldn't get the whole picture in
> > my head.
> >
> > When I create a new matrix as the Local Audio adapter what does it
> > represent to me? Shall I see it as something in the halfway between caed
> > and the physical audio card?
> >
> > How can I connect everything?
> >
> > Thank you all
> >
> > Alessio<hr>_______________________________________________
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> > Rivendell-dev at lists.rivendellaudio.org
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