16 Mar
2004
16 Mar
'04
6:24 a.m.
Hi all,
Ive been playing with ALSA & JACK for the last few days, and i cannot work out
the best way to do this.
I want to setup the following:
app1 >--|
|-> dmix -> brutefir -> alsa -> soundcard
app2 >--|
The bit i cant work out is how to do the apps into a dmix and out to brutefir.
I know i can do this with JACK, but having stereo into brutefir, and 6 chans out
isnt possible.
Any ideas?
Thanks.
16 Mar
16 Mar
6:39 a.m.
Hallo,
Mark Williams (MWP) hat gesagt: // Mark Williams (MWP) wrote:
Ive been playing with ALSA & JACK for the last few
days, and i cannot work out
the best way to do this.
I want to setup the following:
app1 >--|
|-> dmix -> brutefir -> alsa -> soundcard
app2 >--|
What does above "alsa" mean?
The bit i cant work out is how to do the apps into a
dmix and out to brutefir.
I know i can do this with JACK, but having stereo into brutefir, and 6 chans out
isnt possible.
Why?
ciao
--
Frank Barknecht _ ______footils.org__
7:07 a.m.
Hallo,
Mark Williams (MWP) hat gesagt: // Mark Williams (MWP) wrote:
Oh, just that brutefir is using ALSA to output to the soundcard (not OSS, etc).
Ive been playing with ALSA & JACK for the
last few days, and i cannot work out
the best way to do this.
I want to setup the following:
app1 >--|
|-> dmix -> brutefir -> alsa -> soundcard
app2 >--|
What does above "alsa" mean? The bit i cant
work out is how to do the apps into a dmix and out to brutefir.
I know i can do this with JACK, but having stereo into brutefir, and 6 chans out
isnt possible.
Why? 
7:22 a.m.
On Tuesday 16 March 2004 12:01, Mark Williams (MWP) wrote:
Because as stated in the Brutefir docs, you must have
the same number of
JACK inputs & outputs otherwise an error is produced.
Just try to use jackd in Playback-only mode and you will see that this is
wrong. I have a soundcard here where I have a stereo-in and a 6-channel out
and jackd works well with this...
Arnold
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Get my public-key from pgp.mit.edu or pgp.uni-mainz.de
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Hi, I am a .signature virus. Please copy me into your ~/.signature and send me
to all your contacts.
After a month or so log in as root and do a rm / -rf. Or ask your
administrator to do so...
8:14 a.m.
Hi,
Zitat von Arnold Krille <arnold(a)arnoldarts.de>de>:
On Tuesday 16 March 2004 12:01, Mark Williams (MWP)
wrote:
I suppose, Mark is talking about BruteFIR here. It might well be, that Brutefir
does not allow to specify different BruteFIR playback and capture channel
counts. I never used BruteFIR, but it's the same with Pd, which does not
allow this. (It does allow capture- or playback-only.)
All this does not affect Jack itself, of course.
Ciao,
--
Frank Barknecht
Because as stated in the Brutefir docs, you must
have the same number of
JACK inputs & outputs otherwise an error is produced.
Just try to use jackd in Playback-only mode and you will see that this is
wrong. I have a soundcard here where I have a stereo-in and a 6-channel out
and jackd works well with this...
10:12 a.m.
Thanks for all the help guys.
Im still trying to work out how JACK works... the end-user docs for its
operation are almost non-existant. All i seem to find are devel docs and simple
FAQ's like those on the JACK website.
I dont have X installed, so all these nice X windows JACK utils are useless to
me. And no... im not going to install X either.
If im going to use JACK to tie all this together, my first problem is getting it
working with a multichannel ALSA device.
The output card is a Envy24HT... i have asound.conf setup for a PCM per stereo
output (evny_1, envy_2, etc).
How do i tie these channels together to make a single 10 channel device that
JACK can then output to?
Ive tried using "type multi" for a PCM device in asound, but i cannot get it to
work.... even this doesnt work:
pcm.multi
{
type multi;
slaves.a.pcm "envy_1";
slaves.a.channels 2;
bindings.0.slave a;
bindings.0.channel 0;
bindings.1.slave a;
bindings.1.channel 1;
}
where "envy_1" looks like:
pcm.envy_1
{
type plug
slave.pcm {
type hw
card 1
device 0
subdevice 0
}
}
aplay to "envy_1" works fine.
aplay to "multi" says its working, but gives no sound output.
Ill leave it there....
Ill mention the second problem, when this is worked out.
Thanks again everyone.
Hi,
Zitat von Arnold Krille <arnold(a)arnoldarts.de>de>:
On Tuesday 16 March 2004 12:01, Mark Williams
(MWP) wrote:
I suppose, Mark is talking about BruteFIR here. It might well be, that Brutefir
does not allow to specify different BruteFIR playback and capture channel
counts. I never used BruteFIR, but it's the same with Pd, which does not
allow this. (It does allow capture- or playback-only.)
All this does not affect Jack itself, of course. Because as stated in the Brutefir docs, you must
have the same number of
JACK inputs & outputs otherwise an error is produced.
Just try to use jackd in Playback-only mode and you will see that this is
wrong. I have a soundcard here where I have a stereo-in and a 6-channel out
and jackd works well with this...
10:26 a.m.
Hi Mark,
"Mark Williams (MWP)" <mwp(a)internode.on.net> wrote:
Im still trying to work out how JACK works... the
end-user docs for its
operation are almost non-existant. All i seem to find are devel docs and
simple
FAQ's like those on the JACK website.
I dont have X installed, so all these nice X windows JACK utils are useless
to
me. And no... im not going to install X either.
No problem here. Just use "jack_lsp" to list the available ports
and "jack_connect portX portY" to create connections between ports
rsp. "jack_disconnect portX portY" to delete them again. All these are
command line programs. I use X, but I don't like graphical jack patchers
generally either.
If im going to use JACK to tie all this together, my
first problem is getting
it
working with a multichannel ALSA device.
The output card is a Envy24HT... i have asound.conf setup for a PCM per
stereo
output (evny_1, envy_2, etc).
How do i tie these channels together to make a single 10 channel device that
JACK can then output to?
You probably don't need to fiddle with asoundrc at all. Just starting jack as
$ jackd -d alsa -d hw:0
should work. (Later you would do the the next steps, that include getting
jackstart to work and using realtime mode.)
It will simple use up all the in- and outchannels your card has to offer.
"man jackd" will show you some more options to jackd, some of which will let
you specify the number of channels to use or if do do playback only and such.
ciao
--
Frank Barknecht _ ___footils.org_
11:17 a.m.
Im still
trying to work out how JACK works... the end-user docs for its
operation are almost non-existant. All i seem to find are devel docs and
simple
FAQ's like those on the JACK website.
I dont have X installed, so all these nice X windows JACK utils are useless
to
me. And no... im not going to install X either.
No problem here. Just use "jack_lsp" to list the available ports
and "jack_connect portX portY" to create connections between ports
rsp. "jack_disconnect portX portY" to delete them again. All these are
command line programs. I use X, but I don't like graphical jack patchers
generally either. If im going to
use JACK to tie all this together, my first problem is getting
it
working with a multichannel ALSA device.
The output card is a Envy24HT... i have asound.conf setup for a PCM per
stereo
output (evny_1, envy_2, etc).
How do i tie these channels together to make a single 10 channel device that
JACK can then output to?
You probably don't need to fiddle with asoundrc at all. Just starting jack as
$ jackd -d alsa -d hw:0
should work. (Later you would do the the next steps, that include getting
jackstart to work and using realtime mode.)
It will simple use up all the in- and outchannels your card has to offer.
"man jackd" will show you some more options to jackd, some of which will let
you specify the number of channels to use or if do do playback only and such.
12:08 p.m.
Hallo,
Mark Williams (MWP) hat gesagt: // Mark Williams (MWP) wrote:
Ok, thanks, i know about jack_lsp and jack_connect
& disconnect.
But i wasnt sure if there were other setup type utils i would miss by not
having X.
Something I miss (maybe it exists?) is a kind of "jack_lsc" which
lists current connections the way, aconnect does for midi ports. Any
takers?
Ok... that was too simple :)
It picks up the 2 input channels and the 8 output channels.
Its missing the SPDIF output channels though, but im not sure if ill need to use
those as yet... so ill forget about it for the moment.
I think, to enable spdif you might indeed need to resort to an
asoundrc. But this might be worth a quick try:
$ jackd -d alsa -d spdif
ciao
--
Frank Barknecht _ ______footils.org__
17 Mar
17 Mar
1:45 a.m.
Frank Barknecht <fbar(a)footils.org> writes:
I never used BruteFIR, but it's the same with Pd,
which does not
allow this. (It does allow capture- or playback-only.)
hmmm... I just did:
pd -jack -inchannels 2 -outchannels 5
And it gave me 2 in and 5 out...
But I still don't have any idea about BruteFIR (never before heard of it, actually).
-- ./MiS
_
__ __ (_)___ Michal Seta
/ \/ \ _/^ _|
/ V |_ \ @creazone.32k.org
(___/V\___|_|___/
http://www.[creazone]|[noonereceiving].32k.org
3:50 a.m.
New subject: what BruteFIR is, was: Re: [linux-audio-user] How can i set this up?
On Wednesday 17 March 2004 06.39, Michal Seta wrote:
Frank Barknecht <fbar(a)footils.org> writes:
Brutefir is a high performance convolution engine. You convolve a signal with
a specific impulse response. You can for instance use it to make a
multichannel reverb unit (this is a popular technique at the moment),
provided you have an reverb impuls response. There's a nice bunch of IR's
available at http://www.noisevault.com/.
I haven't played with this nearly as much as I'd want to... I'm also not sure
if the impulses at the site referenced actually works with brutefir. I think
I tried some a while ago, and I remember I had problems.
/Robert
I never used BruteFIR, but it's the same with
Pd, which does not
allow this. (It does allow capture- or playback-only.)
hmmm... I just did:
pd -jack -inchannels 2 -outchannels 5
And it gave me 2 in and 5 out...
But I still don't have any idea about BruteFIR (never before heard of it,
actually).
-- ./MiS
_
__ __ (_)___ Michal Seta
/ \/ \ _/^ _|
/ V |_ \ @creazone.32k.org
(___/V\___|_|___/
http://www.[creazone]|[noonereceiving].32k.org
16 Mar
16 Mar
7:26 a.m.
Hi,
On Tuesday 16 March 2004 12.01, Mark Williams (MWP) wrote:
If you are using jack then it would be jack outputting to alsa.... minor
nitpicking...
Because as stated in the Brutefir docs, you must have the same number of
JACK inputs & outputs otherwise an error is produced.
mmm, I don't think this is true. It's possible that BruteFIR's jack
implementation requires this (jack does not), but even if you have 6 inputs
defined you don't have to use them. This should be possible to arrange in
BruteFIR's configuration no?
/Robert
Hallo,
Mark Williams (MWP) hat gesagt: // Mark Williams (MWP) wrote:
Oh, just that brutefir is using ALSA to output to the soundcard (not OSS,
etc). Ive been playing with ALSA & JACK for the
last few days, and i cannot
work out the best way to do this.
I want to setup the following:
app1 >--|
|-> dmix -> brutefir -> alsa -> soundcard
app2 >--|
What does above "alsa" mean? The bit i
cant work out is how to do the apps into a dmix and out to
brutefir.
I know i can do this with JACK, but having stereo into brutefir, and 6
chans out isnt possible.
Why?
7:39 a.m.
Hallo,
Mark Williams (MWP) hat gesagt: // Mark Williams (MWP) wrote:
Because as stated in the Brutefir docs, you must have the same number of JACK
inputs & outputs otherwise an error is produced.
Okay, but is this a problem?
Jack was designed to let applications talk to each other like they
would to hardware (and let them talk to hardware). ALSA was designed
to let applications flexibly use the hardware. So in your case, you
want applications to speak to each other so Jack is the way to go.
Supposed, you want several applications going to Brutefir, and
Brutefir go to the soundcard. So just set up Brutefir to connect to
the alsa_playback:X ports. Then start your other applications. They
should create some more ports like this with two instances of Pd
started:
$ jack_lsp
alsa_pcm:capture_1
alsa_pcm:capture_2
alsa_pcm:playback_1
alsa_pcm:playback_2
pure_data_0:input0
pure_data_0:input1
pure_data_0:output0
pure_data_0:output1
pure_data_1:input0
pure_data_1:input1
pure_data_1:output0
pure_data_1:output1
Now you can connect wildly with jack_connect or the qjackctl GUI. Just
do things like:
$ jack_connect pure_data_0:output1 alsa_pcm:playback_2
$ jack_connect pure_data_1:output0 alsa_pcm:playback_2
$ jack_connect alsa_pcm:capture_2 pure_data_0:input0
Or however you like it. You can connect more than one port to other
ports.
ciao
--
Frank Barknecht _ ______footils.org__
> Mark Williams (MWP) hat gesagt: // Mark Williams
(MWP) wrote:
The bit i cant work out is how to do the apps into a
dmix and out to brutefir.
I know i can do this with JACK, but having stereo into brutefir, and 6 chans out
isnt possible.
Why? 
7:52 a.m.
New subject: [linux-audio-user] Re: [Alsa-user] How can i set this up?
On Tue, 16 Mar 2004, Mark Williams (MWP) wrote:
Hi all,
Ive been playing with ALSA & JACK for the last few days, and i cannot work out
the best way to do this.
I want to setup the following:
app1 >--|
|-> dmix -> brutefir -> alsa -> soundcard
app2 >--|
The bit i cant work out is how to do the apps into a dmix and out to brutefir.
It's not possible at the moment. The dmix plugin expects the raw ALSA
driver interface as endpoint.
Jaroslav
-----
Jaroslav Kysela <perex(a)suse.cz>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
7777
days inactive
7777
days old
linux-audio-user@lists.linuxaudio.org
14 comments
6 participants
participants (6)
-
Arnold Krille -
Frank Barknecht -
Jaroslav Kysela -
Mark Williams (MWP) -
Michal Seta -
Robert Jonsson