18 Mar
2006
18 Mar
'06
4:10 p.m.
Hello everyone,
Sorry if this seems like a bit of a daft question, but I'm happily
running Ubuntu 2.6.15-4rt, alsa, jack etc. on my Acer Aspire laptop,
and have had success using either the built-in laptop sound card or a
USB-audio device (in my case Griffin iMic), either will work fine, but
my question is, is there some way, using Alsa/Jack, to use both at the
same time? As far as I can tell, having read through the docs on alsa
& jack, it's either/or, but I'm sure I'm not the first to try this...
having 2 separate stereo audio outs would be phenomenal, if it works!
Thanks in advance,
David
18 Mar
18 Mar
4:18 p.m.
On Sat Mar 18, 2006 at 01:10:02PM -0800, david golightly wrote:
Hello everyone,
Sorry if this seems like a bit of a daft question, but I'm happily
running Ubuntu 2.6.15-4rt, alsa, jack etc. on my Acer Aspire laptop,
and have had success using either the built-in laptop sound card or a
USB-audio device (in my case Griffin iMic), either will work fine, but
my question is, is there some way, using Alsa/Jack, to use both at the
same time? As far as I can tell, having read through the docs on alsa
& jack, it's either/or, but I'm sure I'm not the first to try this...
having 2 separate stereo audio outs would be phenomenal, if it works!
unless you have identical cards or a house clock driving them, you will need to resample
to keep them in sync. jack_diplomat does this with jackd's running at different
hardware samplerates (say 44117 and 43986). there might be similar magic you can do via
asoundrc.. but afaik its resampling features were really designed for lke 96000->44100,
more than 44117->44100, so might not solve the unique clocks proplem...
Thanks in advance,
David
5:54 p.m.
On Sat, 2006-03-18 at 21:18 +0000, cdr wrote:
unless you have identical cards or a house clock
driving them, you
will need to resample to keep them in sync. jack_diplomat does this
with jackd's running at different hardware samplerates (say 44117 and
43986). there might be similar magic you can do via asoundrc..
Nope, .asoundrc cannot help you with this. You need to use 2 jackd's
and jack_diplomat.
I believe netjack will also address this problem, but I have not seen
any user reports yet and don't know how stable it is.
Lee
6:27 p.m.
On 3/18/06, Lee Revell <rlrevell(a)joe-job.com> wrote:
On Sat, 2006-03-18 at 21:18 +0000, cdr wrote:
Or use cards that allow you to set an external clock source, such as
the RME HDSP cards. Set the cards to both clock from the same source
(using hdspconf) and you're set.
This is what cdr was suggesting with the phrase 'house clock'.
Cheers,
Mark
unless you have identical cards or a house clock
driving them, you
will need to resample to keep them in sync. jack_diplomat does this
with jackd's running at different hardware samplerates (say 44117 and
43986). there might be similar magic you can do via asoundrc..
Nope, .asoundrc cannot help you with this. You need to use 2 jackd's 
19 Mar
19 Mar
4:32 p.m.
On Sat, Mar 18, 2006 at 05:54:22PM -0500, Lee Revell wrote:
On Sat, 2006-03-18 at 21:18 +0000, cdr wrote:
i have no negative stability reports yet.
its only latency and soundquality, which could still be made better.
--
torben Hohn
http://galan.sourceforge.net -- The graphical Audio language
unless you have identical cards or a house clock
driving them, you
will need to resample to keep them in sync. jack_diplomat does this
with jackd's running at different hardware samplerates (say 44117 and
43986). there might be similar magic you can do via asoundrc..
Nope, .asoundrc cannot help you with this. You need to use 2 jackd's
and jack_diplomat.
I believe netjack will also address this problem, but I have not seen
any user reports yet and don't know how stable it is.
6771
days inactive
6772
days old
linux-audio-user@lists.linuxaudio.org
4 comments
5 participants
participants (5)
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cdr -
david golightly -
Lee Revell -
Mark Knecht -
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