19 Aug
2012
19 Aug
'12
10:11 p.m.
On Sun, 2012-08-19 at 09:49 -0400, Brett McCoy wrote:
On Sun, Aug 19, 2012 at 9:37 AM, Mac <ussndmac(a)charter.net> wrote:
As far as I can tell it handles the firewire device (AF12) ok.
But, when jack starts it gets the 12 i/o's from the AF12 and labels them
with the UUID of the device concatenated with numbers 1 thru 12 and one
channel with no number. (this apparently screws up the auto patch since
the sans number channel is at the bottom of the list and "1" is at the
top. (though the sans number one is indeed physically channel 0)
Jack also starts with all the MOBO onboard audio i/o with "PULSE" as
part of their concatenated names.
I've never seen either behavior in AVLINUX.
I have a system that I've built on AVLINUX that implements a tri-amp
output. It includes CALF plugins, zita-lrx, and the zita replacement for
a2j and j2a.
First glance appears that I may be able to bypass the alsa bridge with
what's showing up in the patch in UBS12.04. But, I need to determine
where and how the pulse connections in qjackctrl are being made. The log
doesn't show a script being run by jack start.
--
Regards,
Mac
Does anyone know of an overview of how audio in
Ubuntu Studio12.04 works?
I've made some mods to other debian builds. Before I spin my wheels a lot
jaunted to see the lay of the land.
Depends on what you want to do, but as far as I know, Ubuntu Studio
doesn't do audio any differently than other Linux distros. Everything
has pretty much just worked out of the box for me. I use RME hardware,
so I disable the internal sound device, and also remove pulseaudio,
since I use jack exclusively for sound on my studio system. I think
support for firewire audio is going to be spotty regardless of what
distro you are using. If you've gotten your device to work in other
distros, it should work in Ubuntu 12.04
19 Aug
19 Aug
11:08 p.m.
New subject: Ubuntustudio 12.04 audio?
On Sun, 19 Aug 2012 22:10:58 +0200, Mac <ussndmac(a)charter.net> wrote:
First glance appears that I may be able to bypass the
alsa bridge with
what's showing up in the patch in UBS12.04. But, I need to determine
where and how the pulse connections in qjackctrl are being made. The log
doesn't show a script being run by jack start.
The connections are only made automatically, if pulseaudio-module-jack is
installed and loaded,
and if "Enable D-Bus interface" is enabled in qjacktl settings, under
"Misc".
What happens in qjackctl is that you start jackdbus instead of jackd with
these options. You can also control jackdbus using: jack_control start|stop
If you want to know how the connections between PA and jack happen, have a
look at pulseaudio-module-jack.
20 Aug
20 Aug
7:06 a.m.
New subject: Ubuntustudio 12.04 audio?
On Sun, August 19, 2012 1:10 pm, Mac wrote:
First glance appears that I may be able to bypass the alsa bridge with
what's showing up in the patch in UBS12.04. But, I need to determine
where and how the pulse connections in qjackctrl are being made. The log
doesn't show a script being run by jack start.
They are being made by pulse. Any config changes will also have to be made
in pulse. The fact that capture/playback 0 is being called no number would
be firewire I would guess. I know less about FW than I would like to (less
about pulse setup than I would like to as well). However, Pulse expects to
live in the ALSA world where captures start at 1 not 0 (the 0 being blank
seems to be a standard linux kernel thing).
None of the stuff in /etc/pulse seems to be helpful. I do wonder if it
would be possible to add a jack file to
/usr/share/pulseaudio/alsa-mixer/profile-sets/
I will see what I can find out. (I have other reasons for finding this
stuff out)
--
Len Ovens
www.OvenWerks.net
12:45 p.m.
New subject: Ubuntustudio 12.04 audio?
On Mon, Aug 20, 2012 at 1:05 AM, Len Ovens <len(a)ovenwerks.net> wrote:
On Sun, August 19, 2012 1:10 pm, Mac wrote:
So far my poking around on the net indicates that dbus service between
pulse and jack are involved. (if you uncheck the start dbus in
qjackctrl only the firewire source/sinks show up).
The pulse source/sinks are provided by pulseaudio-module-jack.
What control over how things are named or created is still
unknown...to me at least.
Mac
First glance appears that I may be able to bypass the alsa bridge with
what's showing up in the patch in UBS12.04. But, I need to determine
where and how the pulse connections in qjackctrl are being made. The log
doesn't show a script being run by jack start.
They are being made by pulse. Any config changes will also have to be made
in pulse. The fact that capture/playback 0 is being called no number would
be firewire I would guess. I know less about FW than I would like to (less
about pulse setup than I would like to as well). However, Pulse expects to
live in the ALSA world where captures start at 1 not 0 (the 0 being blank
seems to be a standard linux kernel thing).
None of the stuff in /etc/pulse seems to be helpful. I do wonder if it
would be possible to add a jack file to
/usr/share/pulseaudio/alsa-mixer/profile-sets/
I will see what I can find out. (I have other reasons for finding this
stuff out)
4:34 p.m.
New subject: Ubuntustudio 12.04 audio?
On Mon, August 20, 2012 3:45 am, Mac wrote:
So far my poking around on the net indicates that dbus
service between
pulse and jack are involved. (if you uncheck the start dbus in
qjackctrl only the firewire source/sinks show up).
The pulse source/sinks are provided by pulseaudio-module-jack.
What control over how things are named or created is still
unknown...to me at least.
Ok I have looked at what I can find of on the pulse-jack bridge. At the
least it should be possible to turn the auto connect feature off. In the
file:
/etc/pulse/default.pa
change the line:
load-module module-jackdbus-detect
to:
load-module module-jackdbus-detect connect=no
This file will need to be edited sudo BTW...
then do the command pulseaudio --kill so pulse respawns and picks up the
new config. Now when starting jack pulse and system will show up but with
no connections. manually connect system/capture to PulseAudio Jack
Source/front-left and capture_1 to front-right and use qjackctl's patchbay
to save this configuration so you can reconnect this way easily. (even
automatically at jackstart from qjackctl). Unfortunately, using the save
current setup option in patchbay does not work. It seems the patch bay
only saves whole device connects. So you have to create four new dummy
devices in the patch bay (two on either side with add. That have only
ports each. The order of ports in these defines is how they will connect.
Or just leave it unconnected and connect manually as needed.
I haven't played with this much... just enough to confirm I could get
stereo connects and that I could switch left and right.
The pulse source and sink modules have command-line options to set them to
only 2 outputs (I wish that was the default) but because they are started
by module-jackdbus-detect, there seems to be no where to put these
options. However, if you normally only have FW as your only output and so
have Jack always running it may be possible to hard start the source and
sink instead of the detect module. Then the options could be set. Still no
connect as it would still choose 1 and 2 instead of 0 and 1.
I am hearing that the FW stack is being moved to ALSA (or added?) but I
don't know how far that is away from actually happening.
--
Len Ovens
www.OvenWerks.net
4:37 p.m.
New subject: Ubuntustudio 12.04 audio?
On 08/20/12 16:33, Len Ovens wrote:
I am hearing that the FW stack is being moved to ALSA
(or added?) but I
don't know how far that is away from actually happening.
Probably very far away. Afaik the developer who worked on this has said
sometime somewhere that he put this effort on indefinite hold. It is
called the fireworks ALSA driver, Clemens Ladisch worked on it.
Best,
Jeremy
5:08 p.m.
New subject: Ubuntustudio 12.04 audio?
On Mon, August 20, 2012 7:37 am, Jeremy Jongepier wrote:
On 08/20/12 16:33, Len Ovens wrote:
It is a lot of work for one person, I would guess each driver for
different devices would have to be redone too. I don't know how well the
FW drivers are supported now. That is if some of them work but have no one
to look after them, it would be hard to get them switched to ALSA. Having
half and half would be just as bad. On the other hand making a framework
that would work for FW devices in general and adding just one device may
give others an interest in porting other drivers.
--
Len Ovens
www.OvenWerks.net
I am hearing that the FW stack is being moved to
ALSA (or added?) but I
don't know how far that is away from actually happening.
Probably very far away. Afaik the developer who worked on this has said
sometime somewhere that he put this effort on indefinite hold. It is
called the fireworks ALSA driver, Clemens Ladisch worked on it.
21 Aug
21 Aug
12:52 p.m.
New subject: Ubuntustudio 12.04 audio?
On Mon, Aug 20, 2012 at 10:33 AM, Len Ovens <len(a)ovenwerks.net> wrote:
On Mon, August 20, 2012 3:45 am, Mac wrote:
That appeared to work for the pulse sinks/sources. But, when I start
the zita-lrx client the sinks and sources get auto connected in the
connection window of qjackctrl.
Who's doing the auto connect...
So far my poking around on the net indicates that
dbus service between
pulse and jack are involved. (if you uncheck the start dbus in
qjackctrl only the firewire source/sinks show up).
The pulse source/sinks are provided by pulseaudio-module-jack.
What control over how things are named or created is still
unknown...to me at least.
Ok I have looked at what I can find of on the pulse-jack bridge. At the
least it should be possible to turn the auto connect feature off. In the
file:
/etc/pulse/default.pa
change the line:
load-module module-jackdbus-detect
to:
load-module module-jackdbus-detect connect=no
This file will need to be edited sudo BTW...
then do the command pulseaudio --kill so pulse respawns and picks up the
new config. Now when starting jack pulse and system will show up but with
no connections. manually connect system/capture to PulseAudio Jack
Source/front-left and capture_1 to front-right and use qjackctl's patchbay
to save this configuration so you can reconnect this way easily. (even
automatically at jackstart from qjackctl). Unfortunately, using the save
current setup option in patchbay does not work. It seems the patch bay
only saves whole device connects. So you have to create four new dummy
devices in the patch bay (two on either side with add. That have only
ports each. The order of ports in these defines is how they will connect.
Or just leave it unconnected and connect manually as needed.
I haven't played with this much... just enough to confirm I could get
stereo connects and that I could switch left and right.
The pulse source and sink modules have command-line options to set them to
only 2 outputs (I wish that was the default) but because they are started
by module-jackdbus-detect, there seems to be no where to put these
options. However, if you normally only have FW as your only output and so
have Jack always running it may be possible to hard start the source and
sink instead of the detect module. Then the options could be set. Still no
connect as it would still choose 1 and 2 instead of 0 and 1.
I am hearing that the FW stack is being moved to ALSA (or added?) but I
don't know how far that is away from actually happening.
3:25 p.m.
New subject: Ubuntustudio 12.04 audio?
On Tue, August 21, 2012 3:52 am, Mac wrote:
That appeared to work for the pulse sinks/sources.
But, when I start
the zita-lrx client the sinks and sources get auto connected in the
connection window of qjackctrl.
Who's doing the auto connect...
That would be zita-lrx I would imagine. Jack doesn't make its own
connections, it has to be told to. In the same way that qjackctl has a
connections bay and can make connections even though it is not jack, any
application that knows how can make a connection too. Some of them can be
started with an option not to auto connect. Some of them will not auto
connect if they can tell a session manager is running. There seems to be
no standard for this.
The funny thing is I don't know of any programs that auto connects the
midi side of things.
--
Len Ovens
www.OvenWerks.net
6:14 p.m.
New subject: Ubuntustudio 12.04 audio?
On Tue, Aug 21, 2012 at 06:25:23AM -0700, Len Ovens wrote:
Zita-lrx *can* autoconnect its outputs, this is specified in
the config file and entirely optional.
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)
Who's
doing the auto connect...
That would be zita-lrx I would imagine.
22 Aug
22 Aug
1:37 a.m.
New subject: Ubuntustudio 12.04 audio?
On Tue, Aug 21, 2012 at 9:25 AM, Len Ovens <len(a)ovenwerks.net> wrote:
On Tue, August 21, 2012 3:52 am, Mac wrote:
Well zita-lrx does and the user can define the names AND define it's
connections...I had totally forgotten...and I wrote the bloody script
that was doing it :O
Funny thing is, the script specifies system:capture_1 the name is
different in qjack, but it gets connected to the correct channel...
That appeared to work for the pulse
sinks/sources. But, when I start
the zita-lrx client the sinks and sources get auto connected in the
connection window of qjackctrl.
Who's doing the auto connect...
That would be zita-lrx I would imagine. Jack doesn't make its own
connections, it has to be told to. In the same way that qjackctl has a
connections bay and can make connections even though it is not jack, any
application that knows how can make a connection too. Some of them can be
started with an option not to auto connect. Some of them will not auto
connect if they can tell a session manager is running. There seems to be
no standard for this.
The funny thing is I don't know of any programs that auto connects the
midi side of things.
2:26 a.m.
New subject: Ubuntustudio 12.04 audio?
On 08/22/2012 01:37 AM, Mac wrote:
Funny thing is, the script specifies system:capture_1
the name is
different in qjack, but it gets connected to the correct channel...
Maybe you have "client/port aliases" enabled in qjackctl.
Compare it to the output of `jack_lsp`.
4505
days inactive
4508
days old
linux-audio-user@lists.linuxaudio.org
11 comments
6 participants
participants (6)
-
Fons Adriaensen -
Jeremy Jongepier -
Kaj Ailomaa -
Len Ovens -
Mac -
Robin Gareus