16 Nov
2007
16 Nov
'07
7:15 a.m.
I'm fiddling with some tools for my own needs and to see what may
be useful for collab interaction. Ecasound, in theory, could be
very useful because it's readily availble, gui/distro agnostic,
and howto usage is easy to paste in email/im/wegpage etc which
are good qualities for a general purpose tool. I've never had the
patience to give it a fair go and frankly, every time I try, I end
being frustrated (just like with Jack but that's ano...)
Anyway, I found a snippet that had this recipe...
1. Start jack from qjackctl ( http://qjackctl.sourceforge.net/ )
2. ecasound -G:jack,eca,recv -c -a:1 -i jack_generic,eca -o output.wav
ecasound> engine-launch
3. Open qjackctl and connect the ports.
If you don't want to do 3. every time, then use the patchbay feature of
qjackctl and have it do it automatically.
Pretty close to one thing I would like to do but I get this
error no matter what -i (or -o) combo I try...
ecasound: ERROR: [ECA-SESSION] : "Audio object 'jack_generic'
does not match any of the known audio device types or file formats.
and the same with jack_alsa and other similar options. Is it possible
that my particular ecasound is compiled without jack support ?
Would anyone have any comments about the usefulness of ecasound
as a general purpose audio manipulation tool ?
Is there another option that could be better ?
--markc
16 Nov
16 Nov
7:58 a.m.
Hi Mark,
I just use this:
ecasound -c -i:jack -o:some.wav
When ecasound (version 2.4.4 here) starts I connect it in QJackCtl. I
enter 't' at the ecaprompt to start recording, 's' to end it, 'q'
to
quit the program. That's for quick & easy simple recording.
Best,
dp
8:34 a.m.
Hi Mark!
Your ecasound seems to be without jack_support.
What I do (and I only use ecasound WITH JACK)
1. start jack
2. start ecasound like this:
ecasound -B:rtlowlatency -b 64 -r 30 -c -a:1 -i jack -o some.wav
3. Launch engine:
ecasound> engine-launch
4. change console and use jack_connect:
jack_connect alsa_pcm:capture_1 ecasound:in_1
jack_connect alsa_pcm:capture_2 ecasound:in_2
5. start recording:
ecasound> t
Note: The options upto and include -r are some realtime options very
handsome to have.
What I mostly find much more useful is:
ecasound [realtime options] -c -a;1 -i jack -o some.wav -a:2 -i null
-pn:metronome,120 -a:2 -o jack_alsa
Note: I use the seperate -a:2 -o jack_alsa because I would end up like this:
ecasound [realtime options] -c -a:1 -i jack -o sometrack.wav -a:2 -i null
-pn:metronome,120 -a:3 -i monitor.wav -a:4 -i other_track.wav ... -a:2,3,4,...
-o jack_alsa
Additional note: I like the clicktrack ladspa-plugin much more than
ecasound's metronome effect-preset (-pn = preset-name)
So youcould do:
cd /usr/local/share/ecasound (or whereever)
vim effect_presets
[add the following]
met = -eli:1769,%1,0.6,0.5 -ppn:bpm \
-ppl:44 -ppd:120 -ppu:244 -pd:click_track
Now you can use (instead of -pn:metronome,120):
-pn:met,120
If there's more, e.g. editing/fx-processing, just ask.
Kindest regards
Julien
--------
Music was my first love and it will be my last (John Miles)
======== FIND MY WEB-PROJECT AT: ========
http://ltsb.sourceforge.net
the Linux TextBased Studio guide
======= AND MY PERSONAL PAGES AT: =======
http://www.juliencoder.de
8:37 a.m.
P.S.:
Ecasound can store it's chainsetups (kind of sessions) in a simple
text-format. It's easy to read for a human and I think easy to realise in
other audio-apps. You can even insert nice explanatory comments.
Kindest regards
Julien
--------
Music was my first love and it will be my last (John Miles)
======== FIND MY WEB-PROJECT AT: ========
http://ltsb.sourceforge.net
the Linux TextBased Studio guide
======= AND MY PERSONAL PAGES AT: =======
http://www.juliencoder.de
8:05 p.m.
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On Fri, Nov 16, 2007 at 09:15:04PM +1000, Mark Constable wrote:
I'm fiddling with some tools for my own needs and
to see what may
be useful for collab interaction. Ecasound, in theory, could be
very useful because it's readily availble, gui/distro agnostic,
and howto usage is easy to paste in email/im/wegpage etc which
are good qualities for a general purpose tool. I've never had the
patience to give it a fair go and frankly, every time I try, I end
being frustrated (just like with Jack but that's ano...)
Anyway, I found a snippet that had this recipe...
1. Start jack from qjackctl ( http://qjackctl.sourceforge.net/ )
2. ecasound -G:jack,eca,recv -c -a:1 -i jack_generic,eca -o output.wav
ecasound> engine-launch
3. Open qjackctl and connect the ports.
If you don't want to do 3. every time, then use the patchbay feature of
qjackctl and have it do it automatically.
Pretty close to one thing I would like to do but I get this
error no matter what -i (or -o) combo I try...
ecasound: ERROR: [ECA-SESSION] : "Audio object 'jack_generic'
does not match any of the known audio device types or file formats.
and the same with jack_alsa and other similar options. Is it possible
that my particular ecasound is compiled without jack support ?
Would anyone have any comments about the usefulness of ecasound
as a general purpose audio manipulation tool ?
Is there another option that could be better ?
I use jack_capture. I love it. Would that be OK?
- -ken
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linux-audio-user@lists.linuxaudio.org
4 comments
4 participants
participants (4)
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Dave Phillips -
Julien Claassen -
Ken Restivo -
Mark Constable