7 Nov
2004
7 Nov
'04
11:37 a.m.
Hi all,
Would it be possible to connect my IMic USB soundcard capture port to the
onboard AC97 soundcard using JACK? I'm able to connect ports of a single
soundcard to each other, however I would like to be able to listen via the
onboard card what I'm recording on the external USB soundcard.
It seems that I have to start the JACK daemon in such a way that it can talk
to both soundcards at the same time.
jackd -V:0.94.0
best,
Jeroen
--
Kile - an Integrated LaTeX Environment for KDE
http://kile.sourceforge.net
7 Nov
7 Nov
11:10 p.m.
Jeroen Wijnhout wrote:
Hi all,
Would it be possible to connect my IMic USB soundcard capture port to the
onboard AC97 soundcard using JACK? I'm able to connect ports of a single
soundcard to each other, however I would like to be able to listen via the
onboard card what I'm recording on the external USB soundcard.
It seems that I have to start the JACK daemon in such a way that it can talk
to both soundcards at the same time.
jackd -V:0.94.0
best,
Jeroen
Jack will only accept one sound card at a time.
That can be a 'virtual' soundcard defined in .asourdrc, but unless you
can sync the cards,
jack will eventually crash anyway. For instance, think about what
happens if your
playback card is running at 44100 hz and your recording card at 44102 hz.
Lacking a wordclock, SMPTE or spdif connetion between sound devices,
your probably
out of luck.
BTW, with soundblaster 16 ISA cards it is possible to sync multiple
cards, by snipping
the crystal from all but one, and jumpering from the remaining crystal
to all the cards.
I presume this will work with other cards as well, but probably only if
they are
identical or really similar. But I'm going to stick with my Maudio 1010.
--
e. j. branagan
the MUSE ยง Nashville, TN
8 Nov
8 Nov
10:07 a.m.
On Monday 08 November 2004 05:09, e. j. branagan - the MUSE wrote:
Jeroen Wijnhout wrote:
I was afraid this would be the answer. The point is that the IMic doesn't seem
to support hardware playthrough (although it is capable of recording and
playing at the same time), so I was trying to get around that. It seems that
I either have to find a hardware solution or enable software playthrough in
Audacity and pray the latency is good enough.
Thanks for your answer.
best,
Jeroen
--
Kile - KDE Integrated LaTeX Editor
http://kile.sourceforge.net
Hi all,
Would it be possible to connect my IMic USB soundcard capture port to the
onboard AC97 soundcard using JACK? I'm able to connect ports of a single
soundcard to each other, however I would like to be able to listen via the
onboard card what I'm recording on the external USB soundcard.
It seems that I have to start the JACK daemon in such a way that it can
talk to both soundcards at the same time.
jackd -V:0.94.0
best,
Jeroen
Jack will only accept one sound card at a time.
That can be a 'virtual' soundcard defined in .asourdrc, but unless you
can sync the cards,
jack will eventually crash anyway. For instance, think about what
happens if your
playback card is running at 44100 hz and your recording card at 44102 hz. 
11:29 p.m.
On 08/11/2004, at 3:37 AM, Jeroen Wijnhout wrote:
Hi all,
Would it be possible to connect my IMic USB soundcard capture port to
the
onboard AC97 soundcard using JACK? I'm able to connect ports of a
single
soundcard to each other, however I would like to be able to listen via
the
onboard card what I'm recording on the external USB soundcard.
It seems that I have to start the JACK daemon in such a way that it
can talk
to both soundcards at the same time.
It's not possible to start jackd on more than one soundcard. You can,
however use ecasound's jack output to kind of simulate it.
Start jackd on the AC97 card, then issue the command:
ecasound -B:rtlowlatency -f:s16,2,44100 -z:nomultitrack -z:nointbuf
-o:jack -i:alsa,<iMic ALSA device>
This is based on a script that I had set up to do something similar. I
can't quite remember why all of those options are there, so they might
not be necessary.
This may be a little unstable, but it's much better than trying to keep
the soundcards synced properly. No guarantees, YMMV.
Regards,
Nathan Callahan
9 Nov
9 Nov
8:47 a.m.
On Tuesday 09 November 2004 05:29, Nathan Callahan wrote:
It's not possible to start jackd on more than one
soundcard. You can,
however use ecasound's jack output to kind of simulate it.
Start jackd on the AC97 card, then issue the command:
ecasound -B:rtlowlatency -f:s16,2,44100 -z:nomultitrack -z:nointbuf
-o:jack -i:alsa,<iMic ALSA device>
This is based on a script that I had set up to do something similar. I
can't quite remember why all of those options are there, so they might
not be necessary.
This may be a little unstable, but it's much better than trying to keep
the soundcards synced properly. No guarantees, YMMV.
Thanks for the tip. It sounds promising, but I don't get it to work properly.
I've started jackd with:
jackd -Rv -d alsa -d default -p 512 -n 3 -r 44100
Everything runs fine (no xruns).
Then I start ecasound as you mentioned, which after a 10 seconds or so says:
- [ Engine init - Driver start ] -------------------------------------------
(eca-engine) Using realtime-scheduling (SCHED_FIFO).
(audioio-alsa) warning! playback overrun - samples lost! Break was at least
6.66 ms long.
zombified - calling shutdown handler
- [ Controller/Batch processing finished ] ---------------------------------
- [ Engine exiting ] -------------------------------------------------------
(eca-controller) Disconnecting chainsetup: "command-line-setup".
(audioio-jack-manager) Connection closed!
- [ Chainsetup disconnected ] ----------------------------------------------
(audioio-alsa) WARNING! While reading from ALSA-pcm device C0D0, there were 1
overruns.
At the same time I the jackd responds with:
subgraph starting at ecasound timed out (subgraph_wait_fd=9, status = 0, state
= Running)
at 618674458 client waiting on 9 took 12732 usecs, status = 1 sig = 618661179
awa = 618661187 fin = 0 dur=0
client ecasound error: awake_at = 618661187 state = 2 timed_out = 2
client failure: client ecasound state = Running errors = 1
*&*&*&*&** senor ecasound - you are a ZOMBIE
++ jack_rechain_graph():
client alsa_pcm: internal client, execution_order=0.
-- jack_rechain_graph()
**** alsa_pcm: xrun of at least 1.152 msecs
load = 1.3967 max usecs: 39.000, spare = 11570.000
load = 0.8965 max usecs: 46.000, spare = 11563.000
load = 0.5774 max usecs: 30.000, spare = 11579.000
removing failed client ecasound state = Not triggered errors = 0
adios senor ecasound
++ jack_rechain_graph():
client alsa_pcm: internal client, execution_order=0.
-- jack_rechain_graph()
Maybe I have to fiddle around with the settings of jackd and ecasound, however
I have no idea what to change to what.
best,
Jeroen
--
Kile - an Integrated LaTeX Environment for KDE
http://kile.sourceforge.net
2:11 p.m.
On Tue, Nov 09, 2004 at 02:47:18PM +0100, Jeroen Wijnhout wrote:
On Tuesday 09 November 2004 05:29, Nathan Callahan
wrote:
You may be able to twiddle with the options and get different results
from a settup like this, but I doubt you will ever get good results. You
are still asking ecasound to take 2 different clock sources and mesh
them together. It's unlikely that this will ever work without causing
xruns.
-Eric Rz.
It's not possible to start jackd on more than
one soundcard. You can,
however use ecasound's jack output to kind of simulate it.
Start jackd on the AC97 card, then issue the command:
ecasound -B:rtlowlatency -f:s16,2,44100 -z:nomultitrack -z:nointbuf
-o:jack -i:alsa,<iMic ALSA device>
This is based on a script that I had set up to do something similar. I
can't quite remember why all of those options are there, so they might
not be necessary.
This may be a little unstable, but it's much better than trying to keep
the soundcards synced properly. No guarantees, YMMV.
Thanks for the tip. It
sounds promising, but I don't get it to work properly.
I've started jackd with:
jackd -Rv -d alsa -d default -p 512 -n 3 -r 44100
Everything runs fine (no xruns).
Then I start ecasound as you mentioned, which after a 10 seconds or so says:
- [ Engine init - Driver start ] -------------------------------------------
(eca-engine) Using realtime-scheduling (SCHED_FIFO).
(audioio-alsa) warning! playback overrun - samples lost! Break was at least
6.66 ms long.
zombified - calling shutdown handler
- [ Controller/Batch processing finished ] ---------------------------------
- [ Engine exiting ] -------------------------------------------------------
(eca-controller) Disconnecting chainsetup: "command-line-setup".
(audioio-jack-manager) Connection closed!
- [ Chainsetup disconnected ] ----------------------------------------------
(audioio-alsa) WARNING! While reading from ALSA-pcm device C0D0, there were 1
overruns.
7502
days inactive
7504
days old
linux-audio-user@lists.linuxaudio.org
5 comments
4 participants
participants (4)
-
e. j. branagan - the MUSE -
Eric Dantan Rzewnicki -
Jeroen Wijnhout -
Nathan Callahan