11 Jan
2011
11 Jan
'11
8:18 a.m.
I'm trying to figure out a way to play a simple loop from the command line. It
doesn't need to be synchronized with anything (our drummer will be talking over it).
I found this archive:
http://comments.gmane.org/gmane.comp.audio.ecasound.general/3843
But there seems to be no "audioloop" in ecasound (I have 2.4.6.1-2 ).
The man page I have on my system mentions "-tl", so I tried that, and it
zombified jack (not good).
Here is what I tried;
$ ecasound -f:f32_le,2,48000 -t:3600 -a:1 -i:audioloop,johnloop48.wav -a:all -o
jack_auto
does nothing, just tells me three tims that it is using realtime-scheduling:
- [ Engine init - Driver start ]
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
Hmm. Goole says try "notransport". So I do.
$ ecasound -f:f32_le,2,48000 -G:jack,ecasound,notransport -tl -a:1
-i:audioloop,johnloop48.wav -a:all -o jack_auto
does nothing, just goes:
- [ Engine init - Driver start ]
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
and then hangs, but at least that tells me only once that it's realtime-scheduling
OK, how about doing what the docs say?
$ ecasound -f:f32_le,2,48000 -G:jack,ecasound,notransport -tl -a:1 -i:johnloop48.wav
-a:all -o jack_auto
plays the loop once, then zombifies
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
zombified - calling shutdown handler
(eca-engine) WARNING: Engine has raised an error! Possible causes: connection
... lost to system services, unable to adapt to changes in operating environment, etc.
- [ Controller/Batch processing finished (-3) ] --------------------------------
ecasound: Warning! Errors detected during processing.
(eca-control-objects) Disconnecting chainsetup: "command-line-setup".
At least I got sound out of it though.
Are there any other command-line tools I could use to loop a wav file, possibly simpler
and less weird than ecasound?
I guess I could write one, just read the bytes out of a wav file in a loop, and dump it
into the jack process callback, wouldn't be too hard. But if something already exists,
then I'd rather use that.
Thanks!
-ken
11 Jan
11 Jan
9:40 a.m.
Hi,
Ken Restivo wrote:
I'm trying to figure out a way to play a simple
loop from the command line. It doesn't need to be synchronized with anything (our
drummer will be talking over it).
If you have mplayer with jack support you could do
something like this:
mplayer -ao jack loopfile.wav -loop 0
(-loop 0 means forever)
Hope this helps,
Lorenzo.
I found this archive:
http://comments.gmane.org/gmane.comp.audio.ecasound.general/3843
But there seems to be no "audioloop" in ecasound (I have 2.4.6.1-2 ).
The man page I have on my system mentions "-tl", so I tried that, and it
zombified jack (not good).
Here is what I tried;
$ ecasound -f:f32_le,2,48000 -t:3600 -a:1 -i:audioloop,johnloop48.wav -a:all -o
jack_auto
does nothing, just tells me three tims that it is using realtime-scheduling:
- [ Engine init - Driver start ]
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
Hmm. Goole says try "notransport". So I do.
$ ecasound -f:f32_le,2,48000 -G:jack,ecasound,notransport -tl -a:1
-i:audioloop,johnloop48.wav -a:all -o jack_auto
does nothing, just goes:
- [ Engine init - Driver start ]
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
and then hangs, but at least that tells me only once that it's realtime-scheduling
OK, how about doing what the docs say?
$ ecasound -f:f32_le,2,48000 -G:jack,ecasound,notransport -tl -a:1 -i:johnloop48.wav
-a:all -o jack_auto
plays the loop once, then zombifies
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
zombified - calling shutdown handler
(eca-engine) WARNING: Engine has raised an error! Possible causes: connection
... lost to system services, unable to adapt to changes in operating environment, etc.
- [ Controller/Batch processing finished (-3) ] --------------------------------
ecasound: Warning! Errors detected during processing.
(eca-control-objects) Disconnecting chainsetup: "command-line-setup".
At least I got sound out of it though.
Are there any other command-line tools I could use to loop a wav file, possibly simpler
and less weird than ecasound?
I guess I could write one, just read the bytes out of a wav file in a loop, and dump it
into the jack process callback, wouldn't be too hard. But if something already exists,
then I'd rather use that.
Thanks!
-ken
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9:49 p.m.
On Tue, Jan 11, 2011 at 09:40:14AM +0100, Lorenzo Sutton wrote:
Hi,
Ken Restivo wrote:
That leaves a 1-second gap between plays, which doesn't exactly work for a loop.
-ken
------------
I'm trying to figure out a way to play a
simple loop from the command line. It doesn't need to be synchronized with anything
(our drummer will be talking over it).
If you have mplayer with jack support you
could do something like this:
mplayer -ao jack loopfile.wav -loop 0
(-loop 0 means forever) I found this
archive:
http://comments.gmane.org/gmane.comp.audio.ecasound.general/3843
But there seems to be no "audioloop" in ecasound (I have 2.4.6.1-2 ).
The man page I have on my system mentions "-tl", so I tried that, and it
zombified jack (not good).
Here is what I tried;
$ ecasound -f:f32_le,2,48000 -t:3600 -a:1 -i:audioloop,johnloop48.wav -a:all -o
jack_auto
does nothing, just tells me three tims that it is using realtime-scheduling:
- [ Engine init - Driver start ]
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
Hmm. Goole says try "notransport". So I do.
$ ecasound -f:f32_le,2,48000 -G:jack,ecasound,notransport -tl -a:1
-i:audioloop,johnloop48.wav -a:all -o jack_auto
does nothing, just goes:
- [ Engine init - Driver start ]
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
and then hangs, but at least that tells me only once that it's realtime-scheduling
OK, how about doing what the docs say?
$ ecasound -f:f32_le,2,48000 -G:jack,ecasound,notransport -tl -a:1 -i:johnloop48.wav
-a:all -o jack_auto
plays the loop once, then zombifies
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
zombified - calling shutdown handler
(eca-engine) WARNING: Engine has raised an error! Possible causes: connection
... lost to system services, unable to adapt to changes in operating environment, etc.
- [ Controller/Batch processing finished (-3) ] --------------------------------
ecasound: Warning! Errors detected during processing.
(eca-control-objects) Disconnecting chainsetup: "command-line-setup".
At least I got sound out of it though.
Are there any other command-line tools I could use to loop a wav file, possibly simpler
and less weird than ecasound?
I guess I could write one, just read the bytes out of a wav file in a loop, and dump it
into the jack process callback, wouldn't be too hard. But if something already exists,
then I'd rather use that.
Thanks!
-ken
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-user
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-user 
12 Jan
12 Jan
6:26 a.m.
Ken Restivo wrote:
On Tue, Jan 11, 2011 at 09:40:14AM +0100, Lorenzo
Sutton wrote:
Sorry, I've never noticed that. I don't do much looping ...
--
David
gnome(a)hawaii.rr.com
authenticity, honesty, community
Hi,
Ken Restivo wrote:
That leaves a 1-second gap between plays, which doesn't exactly work
for a loop.
-ken I'm trying to figure out a way to play a
simple loop from the
command line. It doesn't need to be synchronized with anything
(our drummer will be talking over it).
If you have mplayer with jack support you
could do something like
this:
mplayer -ao jack loopfile.wav -loop 0
(-loop 0 means forever)
11 Jan
11 Jan
9:53 a.m.
Ken Restivo wrote:
I'm trying to figure out a way to play a simple
loop from the command line. It doesn't need to be synchronized with anything (our
drummer will be talking over it).
I found this archive:
http://comments.gmane.org/gmane.comp.audio.ecasound.general/3843
But there seems to be no "audioloop" in ecasound (I have 2.4.6.1-2 ).
The man page I have on my system mentions "-tl", so I tried that, and it
zombified jack (not good).
Here is what I tried;
$ ecasound -f:f32_le,2,48000 -t:3600 -a:1 -i:audioloop,johnloop48.wav -a:all -o
jack_auto
does nothing, just tells me three tims that it is using realtime-scheduling:
- [ Engine init - Driver start ]
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
Hmm. Goole says try "notransport". So I do.
$ ecasound -f:f32_le,2,48000 -G:jack,ecasound,notransport -tl -a:1
-i:audioloop,johnloop48.wav -a:all -o jack_auto
does nothing, just goes:
- [ Engine init - Driver start ]
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
and then hangs, but at least that tells me only once that it's realtime-scheduling
OK, how about doing what the docs say?
$ ecasound -f:f32_le,2,48000 -G:jack,ecasound,notransport -tl -a:1 -i:johnloop48.wav
-a:all -o jack_auto
plays the loop once, then zombifies
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).
zombified - calling shutdown handler
(eca-engine) WARNING: Engine has raised an error! Possible causes: connection
... lost to system services, unable to adapt to changes in operating environment, etc.
- [ Controller/Batch processing finished (-3) ] --------------------------------
ecasound: Warning! Errors detected during processing.
(eca-control-objects) Disconnecting chainsetup: "command-line-setup".
At least I got sound out of it though.
Are there any other command-line tools I could use to loop a wav file, possibly simpler
and less weird than ecasound?
mplayer -loop 0 filename.wav
0 says to loop forever. Use some other number to loop how many times you
want, then have it stop.
The mplayer I have here (stock Debian Lenny) supports using JACK.
--
David
gnome(a)hawaii.rr.com
authenticity, honesty, community
9:57 p.m.
On Tue, Jan 11, 2011 at 3:47 PM, Ken Restivo <ken(a)restivo.org> wrote:
On Tue, Jan 11, 2011 at 07:04:23AM -0500, Paul Davis
wrote:
http://jackaudio.org/faq
to be clear, i should have added: aplay -D jack -q
simplest?:
#!/bin/sh
while [ true ] ; do aplay -q $* ; done
Aplay doesn't work with JACK (at least on my system, or at least I didn't see
that in the manpage). 
12 Jan
12 Jan
8:45 a.m.
Il giorno mar, 11/01/2011 alle 07.04 -0500, Paul Davis ha scritto:
simplest?:
#!/bin/sh
while [ true ] ; do aplay -q $* ; done
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what about vlc?
vlc -I dummy -L loop.wav
It works with jack also
Ivan
11 Jan
11 Jan
10:27 p.m.
Ken Restivo <ken(a)restivo.org> writes:
I found this archive:
http://comments.gmane.org/gmane.comp.audio.ecasound.general/3843
You found me;).
But there seems to be no "audioloop" in
ecasound (I have 2.4.6.1-2 ).
It works here.
ecasound v2.7.0
Here is what I tried;
$ ecasound -f:f32_le,2,48000 -t:3600 -a:1 -i:audioloop,johnloop48.wav -a:all -o
jack_auto
This works here:
//play loop while recording
ecasound -t:3600 -a:1 -i:jack_auto,default -o:recordfile.wav -a:2
-i:audioloop,dance_of_the_engineer__prod_b0ef.wav -o:jack_auto,default
//then play both the recording and the loop;) - lower volume on 1
ecasound -t:3600 -a:1 -i:recordfile.wav -ea 25 -o:jack_auto,default -a:2
-i:audioloop,dance_of_the_engineer__prod_b0ef.wav -o:jack_auto,default
--
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http://www. s t n m
irc://irc. b - i . e/%23contact
sip:b0ef@ e e
jid:b0ef@ n n
12 Jan
12 Jan
2:15 a.m.
On Tue, Jan 11, 2011 at 11:22:05PM +0100, Esben Stien wrote:
This works here:
//play loop while recording
ecasound -t:3600 -a:1 -i:jack_auto,default -o:recordfile.wav -a:2
-i:audioloop,dance_of_the_engineer__prod_b0ef.wav -o:jack_auto,default
FWIW, jack_auto is deprecated as of 2.6.0. You can do it all
using just 'jack':
input from soundcard: -i:jack,system
output to soundcard: -o:jack,system
--
Joel Roth
5117
days inactive
5118
days old
linux-audio-user@lists.linuxaudio.org
10 comments
7 participants
participants (7)
-
david -
Esben Stien -
Ivan Tarozzi -
Joel Roth -
Ken Restivo -
Lorenzo Sutton -
Paul Davis