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Multiple soundcards through one jackd
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Multiple soundcards through one jackd
by Marius/Qtronix
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Hi all.
I'm new to this list (just subscribed), and was hoping someone could maybe help me with a question, or an answer to how to set up what I was hoping. I run a local radio station based on the net, and have two soundscards. What I was hoping, was that it was possible to set up these soundcards to play out through one jackd. The first soundcard is the primary (default) one, and used for cueing audio before it hits the "airwaves". The second soundcard is used for airplay (out to the listeners) and ONLY that. So is there a way to route input from both soundcards through the one and same jackd, and route those out to their respective outputs? For example: card 1 L & R input -> jackd/cue -> card 1 L & R out card 2 L & R input -> jackd/jack-rack -> card 2 L & R out Is this possible? Kindly Marius/Qtronix _______________________________________________ Jack-Devel mailing list Jack-Devel@... http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org |
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Re: Multiple soundcards through one jackd
by Jörn Nettingsmeier-5
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Marius/Qtronix wrote:
> Hi all. > > I'm new to this list (just subscribed), and was hoping someone could maybe > help me with a question, or an answer to how to set up what I was hoping. > > I run a local radio station based on the net, and have two soundscards. > What I was hoping, was that it was possible to set up these soundcards to > play out through one jackd. > > The first soundcard is the primary (default) one, and used for cueing > audio before it hits the "airwaves". > The second soundcard is used for airplay (out to the listeners) and ONLY > that. > > So is there a way to route input from both soundcards through the one and > same jackd, and route those out to their respective outputs? > > For example: > card 1 L & R input -> jackd/cue -> card 1 L & R out > card 2 L & R input -> jackd/jack-rack -> card 2 L & R out > > Is this possible? no. for the simple reason that both cards contain a clock, and those two clocks will deviate ever so slightly. to the point where one card is waiting on a full buffer, and the other is stalling on an empty buffer, and then jackd will rightfully explode in your face. do yourself a favour and get a decent multichannel card, especially since you're running a public service... -- Jörn Nettingsmeier Meister für Veranstaltungstechnik Audio and event engineer Ambisonic surround recordings http://stackingdwarves.net +49 177 7937487 _______________________________________________ Jack-Devel mailing list Jack-Devel@... http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org |
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Re: Multiple soundcards through one jackd
by Ralf Mardorf
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Jörn Nettingsmeier wrote:
> Marius/Qtronix wrote: > >> Hi all. >> >> I'm new to this list (just subscribed), and was hoping someone could maybe >> help me with a question, or an answer to how to set up what I was hoping. >> >> I run a local radio station based on the net, and have two soundscards. >> What I was hoping, was that it was possible to set up these soundcards to >> play out through one jackd. >> >> The first soundcard is the primary (default) one, and used for cueing >> audio before it hits the "airwaves". >> The second soundcard is used for airplay (out to the listeners) and ONLY >> that. >> >> So is there a way to route input from both soundcards through the one and >> same jackd, and route those out to their respective outputs? >> >> For example: >> card 1 L & R input -> jackd/cue -> card 1 L & R out >> card 2 L & R input -> jackd/jack-rack -> card 2 L & R out >> >> Is this possible? >> > > no. > > for the simple reason that both cards contain a clock, and those two > clocks will deviate ever so slightly. to the point where one card is > waiting on a full buffer, and the other is stalling on an empty buffer, > and then jackd will rightfully explode in your face. > > do yourself a favour and get a decent multichannel card, especially > since you're running a public service... > Some sound cards can be synced. _______________________________________________ Jack-Devel mailing list Jack-Devel@... http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org |
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Re: Multiple soundcards through one jackd
by Ralf Mardorf
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Jörn Nettingsmeier wrote:
> Marius/Qtronix wrote: > >> Hi all. >> >> I'm new to this list (just subscribed), and was hoping someone could maybe >> help me with a question, or an answer to how to set up what I was hoping. >> >> I run a local radio station based on the net, and have two soundscards. >> What I was hoping, was that it was possible to set up these soundcards to >> play out through one jackd. >> >> The first soundcard is the primary (default) one, and used for cueing >> audio before it hits the "airwaves". >> The second soundcard is used for airplay (out to the listeners) and ONLY >> that. >> >> So is there a way to route input from both soundcards through the one and >> same jackd, and route those out to their respective outputs? >> >> For example: >> card 1 L & R input -> jackd/cue -> card 1 L & R out >> card 2 L & R input -> jackd/jack-rack -> card 2 L & R out >> >> Is this possible? >> > > no. > > for the simple reason that both cards contain a clock, and those two > clocks will deviate ever so slightly. to the point where one card is > waiting on a full buffer, and the other is stalling on an empty buffer, > and then jackd will rightfully explode in your face. > > do yourself a favour and get a decent multichannel card, especially > since you're running a public service... > I didn't read this, but maybe this howto is usable: http://quicktoots.linuxaudio.org/toots/el-cheapo/ Or try this one: http://www.sound-man.co.uk/linuxaudio/ice1712multi.html _______________________________________________ Jack-Devel mailing list Jack-Devel@... http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org |
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Re: Multiple soundcards through one jackd
by Marius/Qtronix
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On man, august 17, 2009 01:40, Ralf Mardorf wrote:
> Jörn Nettingsmeier wrote: >> Marius/Qtronix wrote: >> >>> Hi all. >>> >>> I'm new to this list (just subscribed), and was hoping someone could >>> maybe >>> help me with a question, or an answer to how to set up what I was >>> hoping. >>> >>> I run a local radio station based on the net, and have two soundscards. >>> What I was hoping, was that it was possible to set up these soundcards >>> to >>> play out through one jackd. >>> >>> The first soundcard is the primary (default) one, and used for cueing >>> audio before it hits the "airwaves". >>> The second soundcard is used for airplay (out to the listeners) and >>> ONLY >>> that. >>> >>> So is there a way to route input from both soundcards through the one >>> and >>> same jackd, and route those out to their respective outputs? >>> >>> For example: >>> card 1 L & R input -> jackd/cue -> card 1 L & R out >>> card 2 L & R input -> jackd/jack-rack -> card 2 L & R out >>> >>> Is this possible? >>> >> >> no. >> >> for the simple reason that both cards contain a clock, and those two >> clocks will deviate ever so slightly. to the point where one card is >> waiting on a full buffer, and the other is stalling on an empty buffer, >> and then jackd will rightfully explode in your face. >> >> do yourself a favour and get a decent multichannel card, especially >> since you're running a public service... >> > > Some sound cards can be synced. > I use two SB Live 5.1 cards, so dunno if these are able to sync or not. :p Does anyone recommend a good but not too expensive multichannel-card then? --- Marius/Qtronix _______________________________________________ Jack-Devel mailing list Jack-Devel@... http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org |
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Re: Multiple soundcards through one jackd
by Dominique Michel-2
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Le Mon, 17 Aug 2009 08:41:01 +0200 (CEST),
"Marius/Qtronix" <qtronix@...> a écrit : > On man, august 17, 2009 01:40, Ralf Mardorf wrote: > > Jörn Nettingsmeier wrote: > >> Marius/Qtronix wrote: > >> > >>> Hi all. > >>> > >>> I'm new to this list (just subscribed), and was hoping someone could > >>> maybe > >>> help me with a question, or an answer to how to set up what I was > >>> hoping. > >>> > >>> I run a local radio station based on the net, and have two soundscards. > >>> What I was hoping, was that it was possible to set up these soundcards > >>> to > >>> play out through one jackd. > >>> > >>> The first soundcard is the primary (default) one, and used for cueing > >>> audio before it hits the "airwaves". > >>> The second soundcard is used for airplay (out to the listeners) and > >>> ONLY > >>> that. > >>> > >>> So is there a way to route input from both soundcards through the one > >>> and > >>> same jackd, and route those out to their respective outputs? > >>> > >>> For example: > >>> card 1 L & R input -> jackd/cue -> card 1 L & R out > >>> card 2 L & R input -> jackd/jack-rack -> card 2 L & R out > >>> > >>> Is this possible? > >>> > >> > >> no. > >> > >> for the simple reason that both cards contain a clock, and those two > >> clocks will deviate ever so slightly. to the point where one card is > >> waiting on a full buffer, and the other is stalling on an empty buffer, > >> and then jackd will rightfully explode in your face. > >> > >> do yourself a favour and get a decent multichannel card, especially > >> since you're running a public service... > >> > > > > Some sound cards can be synced. > > > > I use two SB Live 5.1 cards, so dunno if these are able to sync or not. :p > Does anyone recommend a good but not too expensive multichannel-card then? Only professional sound cards and some semi-pro cards can be synced. With am emu10k1 card, how you can do multichannel is explained into emu10k1-jack.txt (kernel documentation if the kernel sources are installed, alsa-driver documentation otherwise). Dominique > > --- > Marius/Qtronix > > > _______________________________________________ > Jack-Devel mailing list > Jack-Devel@... > http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org -- If this message is send to an email list, please make sure to answer onto the list, or you will be ignored. "We have the heroes we deserve." _______________________________________________ Jack-Devel mailing list Jack-Devel@... http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org |
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Re: Multiple soundcards through one jackd
by Ralf Mardorf
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Dominique Michel wrote:
> Le Mon, 17 Aug 2009 08:41:01 +0200 (CEST), > "Marius/Qtronix" <qtronix@...> a écrit : > > >> On man, august 17, 2009 01:40, Ralf Mardorf wrote: >> >>> Jörn Nettingsmeier wrote: >>> >>>> Marius/Qtronix wrote: >>>> >>>> >>>>> Hi all. >>>>> >>>>> I'm new to this list (just subscribed), and was hoping someone could >>>>> maybe >>>>> help me with a question, or an answer to how to set up what I was >>>>> hoping. >>>>> >>>>> I run a local radio station based on the net, and have two soundscards. >>>>> What I was hoping, was that it was possible to set up these soundcards >>>>> to >>>>> play out through one jackd. >>>>> >>>>> The first soundcard is the primary (default) one, and used for cueing >>>>> audio before it hits the "airwaves". >>>>> The second soundcard is used for airplay (out to the listeners) and >>>>> ONLY >>>>> that. >>>>> >>>>> So is there a way to route input from both soundcards through the one >>>>> and >>>>> same jackd, and route those out to their respective outputs? >>>>> >>>>> For example: >>>>> card 1 L & R input -> jackd/cue -> card 1 L & R out >>>>> card 2 L & R input -> jackd/jack-rack -> card 2 L & R out >>>>> >>>>> Is this possible? >>>>> >>>>> >>>> no. >>>> >>>> for the simple reason that both cards contain a clock, and those two >>>> clocks will deviate ever so slightly. to the point where one card is >>>> waiting on a full buffer, and the other is stalling on an empty buffer, >>>> and then jackd will rightfully explode in your face. >>>> >>>> do yourself a favour and get a decent multichannel card, especially >>>> since you're running a public service... >>>> >>>> >>> Some sound cards can be synced. >>> >>> >> I use two SB Live 5.1 cards, so dunno if these are able to sync or not. :p >> Does anyone recommend a good but not too expensive multichannel-card then? >> > > Only professional sound cards and some semi-pro cards can be synced. > > With am emu10k1 card, how you can do multichannel is explained into > emu10k1-jack.txt (kernel documentation if the kernel sources are installed, > alsa-driver documentation otherwise). I never tested it myself, but sync for the analogue IOs might be possible by just connecting SPDIF or any other digital IO for non-pro cards. Ralf _______________________________________________ Jack-Devel mailing list Jack-Devel@... http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org |
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Re: Multiple soundcards through one jackd
by D Diaconeasa
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Hello,
How bad would the quality suffer with the use of "alsa_in" ? It does synch-ing through resampling with a variable factor and by putting back frames in the audio buffer if necessary. Regards, Dragos 2009/8/16 Jörn Nettingsmeier <nettings@...> Marius/Qtronix wrote: _______________________________________________ Jack-Devel mailing list Jack-Devel@... http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org |
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