31 Jan
2013
31 Jan
'13
8:59 p.m.
Okay, I've got jackd working with my usb audio device and audacity.
And, yes, recording works very nicely. Thanks for the help!
Now, I want to plug in a usb microphone in addition to the other
device already running. So, the question becomes: How do I add a 2nd
device to an already running jackd? Or do I need to tell jack when it
starts to use 2 devices (again, how?). And, will audacity catch on to
this?
--
**** Listen to my CD at http://www.mellowood.ca/music/cedars ****
Bob van der Poel ** Wynndel, British Columbia, CANADA **
EMAIL: bob(a)mellowood.ca
WWW: http://www.mellowood.ca
31 Jan
31 Jan
9:07 p.m.
On Thu, Jan 31, 2013 at 2:59 PM, Bob van der Poel <bob(a)mellowood.ca> wrote:
Okay, I've got jackd working with my usb audio
device and audacity.
And, yes, recording works very nicely. Thanks for the help!
Now, I want to plug in a usb microphone in addition to the other
device already running. So, the question becomes: How do I add a 2nd
device to an already running jackd? Or do I need to tell jack when it
starts to use 2 devices (again, how?). And, will audacity catch on to
this?
In this case I would probably start jack using the USB audio interface
and use alsa_in for the microphone.
--Steve
10:13 p.m.
On Thu, Jan 31, 2013 at 2:06 PM, S C Rigler <riglersc(a)gmail.com> wrote:
On Thu, Jan 31, 2013 at 2:59 PM, Bob van der Poel
<bob(a)mellowood.ca> wrote:
Thanks. Okay did that :)
1. Got jack running. No problems
2. Started alas_in with
alsa_in hw:4,0
It says:
bob$ alsa_in hw:4,0
Cannot lock down 82241434 byte memory area (Cannot allocate memory)
selected sample format: 32bit
delay = 1019
And run audacity which gives me another input selection "alsa_in".
Only problem is that when I record from this I get static. Recording
from plain alsa works okay, so the device/mic are problably okay.
So, I probably need to do more in setting up the alsa_in other than
the defaults? Not sure what though.
--
**** Listen to my CD at http://www.mellowood.ca/music/cedars ****
Bob van der Poel ** Wynndel, British Columbia, CANADA **
EMAIL: bob(a)mellowood.ca
WWW: http://www.mellowood.ca
Okay, I've got jackd working with my usb
audio device and audacity.
And, yes, recording works very nicely. Thanks for the help!
Now, I want to plug in a usb microphone in addition to the other
device already running. So, the question becomes: How do I add a 2nd
device to an already running jackd? Or do I need to tell jack when it
starts to use 2 devices (again, how?). And, will audacity catch on to
this?
In this case I would probably start jack using the USB audio interface
and use alsa_in for the microphone.
--Steve 
1 Feb
1 Feb
3:01 p.m.
S C Rigler <riglersc@...> writes:
On Thu, Jan 31, 2013 at 2:59 PM, Bob van der Poel
<bob@...> wrote:
FWIW, I tried alsa_out once upon a time, to handle a 4-channel-out USB interface
that appears to Linux as two stereo devices. It was a complete disaster. After
booting Jack and launching alsa_out, it took between 5 and 10 minutes before the
devices would synchronize. Before that, constant glitching. Then, if I left the
devices silent for a time, they would go out of sync again after a few minutes.
More glitching.
At that point, I started to feel that was no longer a viable solution to
explore. I (still) wouldn't trust alsa_out or _in for anything serious.
YMMV.
hjh
Now, I want to plug in a usb microphone in
addition to the other
device already running. So, the question becomes: How do I add a 2nd
device to an already running jackd? Or do I need to tell jack when it
starts to use 2 devices (again, how?). And, will audacity catch on to
this?
In this case I would probably start jack using the USB audio interface
and use alsa_in for the microphone.
3:36 p.m.
On Fri, Feb 1, 2013 at 9:00 AM, James Harkins <jamshark70(a)gmail.com> wrote:
FWIW, I tried alsa_out once upon a time, to handle a
4-channel-out USB interface
that appears to Linux as two stereo devices. It was a complete disaster. After
booting Jack and launching alsa_out, it took between 5 and 10 minutes before the
devices would synchronize. Before that, constant glitching. Then, if I left the
devices silent for a time, they would go out of sync again after a few minutes.
More glitching.
At that point, I started to feel that was no longer a viable solution to
explore. I (still) wouldn't trust alsa_out or _in for anything serious.
YMMV.
hjh
My primary audio interface is an Echo AudioFire 4 and I'll
occasionally use alsa_in to route a (mono) M-Audio JamLab into
Guitarix. It works well enough for that and what the OP was asking
sounded like a similar case.
--Steve
3:56 p.m.
Zita-ajbridge
Zita-ajbridge provides two applications, zita-a2j and zita-j2a. They
allow to use an ALSA device as a Jack client, to provide additional
capture (a2j) or playback (j2a) channels. Functionally these are
equivalent to the alsa_in and alsa_out clients that come with Jack,
but they provide much better audio quality. The resampling ratio will
typically be stable within 1 PPM and change only very smoothly. Delay
will be stable as well even under worst case conditions, e.g. the Jack
client running near the end of the cycle
On 1 February 2013 15:36, S C Rigler <riglersc(a)gmail.com> wrote:
On Fri, Feb 1, 2013 at 9:00 AM, James Harkins
<jamshark70(a)gmail.com> wrote:
FWIW, I tried alsa_out once upon a time, to
handle a 4-channel-out USB interface
that appears to Linux as two stereo devices. It was a complete disaster. After
booting Jack and launching alsa_out, it took between 5 and 10 minutes before the
devices would synchronize. Before that, constant glitching. Then, if I left the
devices silent for a time, they would go out of sync again after a few minutes.
More glitching.
At that point, I started to feel that was no longer a viable solution to
explore. I (still) wouldn't trust alsa_out or _in for anything serious.
YMMV.
hjh
My primary audio interface is an Echo AudioFire 4 and I'll
occasionally use alsa_in to route a (mono) M-Audio JamLab into
Guitarix. It works well enough for that and what the OP was asking
sounded like a similar case.
--Steve
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-user
2 Feb
2 Feb
2:21 a.m.
On Fri, Feb 1, 2013 at 8:55 AM, mark hadman <markhadman(a)googlemail.com> wrote:
From
http://kokkinizita.linuxaudio.org/linuxaudio/index.html :
Zita-ajbridge
Zita-ajbridge provides two applications, zita-a2j and zita-j2a. They
allow to use an ALSA device as a Jack client, to provide additional
capture (a2j) or playback (j2a) channels. Functionally these are
equivalent to the alsa_in and alsa_out clients that come with Jack,
but they provide much better audio quality. The resampling ratio will
typically be stable within 1 PPM and change only very smoothly. Delay
will be stable as well even under worst case conditions, e.g. the Jack
client running near the end of the cycle
I'm getting really lazy these days ... and get un-excited about
building stuff from source. There doesn't seem to be .deb for this for
ubuntu 12.04 so I'll pass for now :)
--
**** Listen to my CD at http://www.mellowood.ca/music/cedars ****
Bob van der Poel ** Wynndel, British Columbia, CANADA **
EMAIL: bob(a)mellowood.ca
WWW: http://www.mellowood.ca
3 Feb
3 Feb
8:30 a.m.
On 02/02/13 10:21, Bob van der Poel wrote:
On Fri, Feb 1, 2013 at 8:55 AM, mark
hadman<markhadman(a)googlemail.com> wrote:
zita-ajbridge is in debian, it will probably install in ubuntu?
simon
From
http://kokkinizita.linuxaudio.org/linuxaudio/index.html :
Zita-ajbridge
Zita-ajbridge provides two applications, zita-a2j and zita-j2a. They
allow to use an ALSA device as a Jack client, to provide additional
capture (a2j) or playback (j2a) channels. Functionally these are
equivalent to the alsa_in and alsa_out clients that come with Jack,
but they provide much better audio quality. The resampling ratio will
typically be stable within 1 PPM and change only very smoothly. Delay
will be stable as well even under worst case conditions, e.g. the Jack
client running near the end of the cycle
I'm getting really lazy these days ... and get un-excited about
building stuff from source. There doesn't seem to be .deb for this for
ubuntu 12.04 so I'll pass for now :)
4:48 p.m.
On Sun, February 3, 2013 12:30 am, Simon Wise wrote:
Ubuntu has it for 12.10 and up but not for 12.04. I haven't tried
installing the 12.10 version in 12.04 to see if that would work.
--
Len Ovens
www.OvenWerks.net
On 02/02/13 10:21, Bob van der Poel wrote:
> On Fri, Feb 1, 2013 at 8:55 AM, mark hadman<markhadman(a)googlemail.com>
> wrote:
>> From http://kokkinizita.linuxaudio.org/linuxaudio/index.html :
>>
>> Zita-ajbridge
>>
...
I'm
getting really lazy these days ... and get un-excited about
building stuff from source. There doesn't seem to be .deb for this for
ubuntu 12.04 so I'll pass for now :)
zita-ajbridge is in debian, it will probably install in ubuntu? 
8:28 p.m.
On Sun, Feb 03, 2013 at 08:48:10AM -0800, Len Ovens wrote:
If it doesn't, upgrading the zita-resampler and zita-alsa-pcmi libs
to the 12.10 version (if they are different from the 12.04 ones) is
probably all that's required.
Ciao,
--
FA
A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)
zita-ajbridge
is in debian, it will probably install in ubuntu?
Ubuntu has it for 12.10 and up but not for 12.04. I haven't tried
installing the 12.10 version in 12.04 to see if that would work. 
11:21 p.m.
On Mon, Feb 4, 2013 at 1:48 AM, Len Ovens <len(a)ovenwerks.net> wrote:
Ubuntu has it for 12.10 and up but not for 12.04. I haven't tried
installing the 12.10 version in 12.04 to see if that would work.
It should be in the kxstudio ppa for 12.04, along with the required
dependencies:
https://launchpad.net/~kxstudio-team/+archive/ppa/+index?field.series_filte…
2 Feb
2 Feb
2:10 a.m.
On Fri, Feb 1, 2013 at 8:36 AM, S C Rigler <riglersc(a)gmail.com> wrote:
On Fri, Feb 1, 2013 at 9:00 AM, James Harkins
<jamshark70(a)gmail.com> wrote:
Yes, exactly. Can you share the command like options you use to get it
working? I just tried "alsa_in -d alsa -d mydevice" and it gave me
awful recording (well, mostly just static).
thanks.
--
**** Listen to my CD at http://www.mellowood.ca/music/cedars ****
Bob van der Poel ** Wynndel, British Columbia, CANADA **
EMAIL: bob(a)mellowood.ca
WWW: http://www.mellowood.ca
FWIW, I tried alsa_out once upon a time, to
handle a 4-channel-out USB interface
that appears to Linux as two stereo devices. It was a complete disaster. After
booting Jack and launching alsa_out, it took between 5 and 10 minutes before the
devices would synchronize. Before that, constant glitching. Then, if I left the
devices silent for a time, they would go out of sync again after a few minutes.
More glitching.
At that point, I started to feel that was no longer a viable solution to
explore. I (still) wouldn't trust alsa_out or _in for anything serious.
YMMV.
hjh
My primary audio interface is an Echo AudioFire 4 and I'll
occasionally use alsa_in to route a (mono) M-Audio JamLab into
Guitarix. It works well enough for that and what the OP was asking
sounded like a similar case.
11:04 p.m.
On Fri, Feb 1, 2013 at 8:10 PM, Bob van der Poel <bob(a)mellowood.ca> wrote:
I just make sure the period size, etc matches jackd. So if I run jack
with "-p 128 -n 3" my alsa_in command line will look like "alsa_in -d
hw:3 -p 128 -n 3".
--Steve
My primary
audio interface is an Echo AudioFire 4 and I'll
occasionally use alsa_in to route a (mono) M-Audio JamLab into
Guitarix. It works well enough for that and what the OP was asking
sounded like a similar case.
Yes, exactly. Can you share the command like options you use to get it
working? I just tried "alsa_in -d alsa -d mydevice" and it gave me
awful recording (well, mostly just static).
thanks.
31 Jan
31 Jan
9:08 p.m.
http://jackaudio.org/multiple_devices
(part of the FAQ)
On Thu, Jan 31, 2013 at 3:59 PM, Bob van der Poel <bob(a)mellowood.ca> wrote:
Okay, I've got jackd working with my usb audio
device and audacity.
And, yes, recording works very nicely. Thanks for the help!
Now, I want to plug in a usb microphone in addition to the other
device already running. So, the question becomes: How do I add a 2nd
device to an already running jackd? Or do I need to tell jack when it
starts to use 2 devices (again, how?). And, will audacity catch on to
this?
--
**** Listen to my CD at http://www.mellowood.ca/music/cedars ****
Bob van der Poel ** Wynndel, British Columbia, CANADA **
EMAIL: bob(a)mellowood.ca
WWW: http://www.mellowood.ca
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-user
10:15 p.m.
On Thu, Jan 31, 2013 at 2:08 PM, Paul Davis <paul(a)linuxaudiosystems.com> wrote:
http://jackaudio.org/multiple_devices
(part of the FAQ)
You know, I actually did read that a number of times and it never
occurred to me that alsa_in and alsa_out were actually programs :)
--
**** Listen to my CD at http://www.mellowood.ca/music/cedars ****
Bob van der Poel ** Wynndel, British Columbia, CANADA **
EMAIL: bob(a)mellowood.ca
WWW: http://www.mellowood.ca
4106
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linux-audio-user@lists.linuxaudio.org
14 comments
9 participants
participants (9)
-
Bob van der Poel -
Fons Adriaensen -
James Harkins -
Len Ovens -
mark hadman -
michael noble -
Paul Davis -
S C Rigler -
Simon Wise