1 Apr
2016
1 Apr
'16
1:37 a.m.
Hi, hope I am asking in the correct place here.
I have a Creative E-MU 0044 and it seems to work fine.
arecord -l gives me:
*/card 1: USB [E-MU 0404 | USB], device 0: USB Audio [USB Audio]/*
*/ Subdevices: 1/1/*
*/ Subdevice #0: subdevice #0/*
I seem to be able to record
*/$ arecord -t wav -r 44100 -c 2 -f S24_3LE -D hw:1,0 mon.wav/*
*/Recording WAVE 'mon.wav' : Signed 24 bit Little Endian in 3bytes, Rate
44100 Hz, Stereo
/*I wish to use this card with darkice (internet audio streaming) but
darkice doe not seem to like 24bit interface cards.
I believe that I can do something in .asoundrc (which I believe is a
ALSA config file that sits in my home directory), to convert the 24bit
device to a 16bit device.
I think I could setup a alsa device called e_mu_16 whitch would be the
same as hw:1,0 but 16 bit.
Any help with this would be really appreciated.
Kind regards,
Ben
--
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1 Apr
1 Apr
1:50 a.m.
Ben Edwards, Apr 1 2016:
...
I believe that I can do something in .asoundrc (which
I believe is a ALSA
config file that sits in my home directory), to convert the 24bit device to a
16bit device.
Have you tried plughw as a device:
plughw:1,0
The plug or plughw allows for some automatic conversions. Otherwise would you consider
JACK - the JACK Audio Connection Kit?
...
Ta-ta
----
Ffanci
* Homepage: https://freeshell.de/~silvain
* Twitter: http://twitter.com/ffanci_silvain
* GitHub: https://github.com/fsilvain
3:17 a.m.
On 01/04/2016 00:50, Ffanci Silvain wrote:
Ben Edwards, Apr 1 2016:
...
OK, had a look at http://www.alsa-project.org/main/index.php/Asoundrc.
Seems I need to use a slave.
Is this correct?
pcm_slave.sl3 {
pcm "hw:1,0"
format S16_LE
channels 2
rate /44100 /
}
pcm.complex_convert {
type plug
slave sl3
}
Not sure exactly what S16_LE. Cant find a list of the formats. Or is
this the format of the card, not the format I want.
Not against using jack but only if I have to. It seems more complex and
I am very new to al this.
Ben
--
*Ben Edwards, Video Editor/Colorist & Cameraman*
w:www.funkytwig.com t. 01179 118 144 m.:07773 02 44 82
skype:funkytwig twitter:@funkytwig
PGP Public key available from pgp.mit.edu
If you are a freelancer FreeAgent is a great system to do your accounts,
if you use http://www.freeagent.com/?referrer=42j4d743
(referral code is 42j4d743) you get 10% off each month.
I believe that I can do something in .asoundrc
(which I believe is a
ALSA config file that sits in my home directory), to convert the
24bit device to a 16bit device.
Have you tried plughw as a device:
plughw:1,0
The plug or plughw allows for some automatic conversions. Otherwise
would you consider JACK - the JACK Audio Connection Kit?
9:14 a.m.
Ben Edwards, Apr 1 2016:
...
I need to use a slave.
Yes, but I haven't
seen it like that, if it works though...
Is this correct?
pcm_slave.sl3 {
pcm "hw:1,0"
format S16_LE
channels 2
rate /44100 /
}
pcm.complex_convert {
type plug
slave sl3
}
Don't put the slashes around your sample rate. I'd normally put all the
sl3 code inside your complex_converter, where you said:
slave sl3
I would have written:
slave {
pcm "hw:1,0,0"
...
}
Not sure exactly what S16_LE. Cant find a list of the
formats. Or is this
the format of the card, not the format I want.
S16_LE = signed 16bit Little Endian,
which is what you want. Take a look at the manpage for arecord:
man arecord
then search for s16_le:
/s16_le
you will come to a full list of accepted bit depth/sample formats of ALSA.
Not against using jack but only if I have to. It seems more complex and I am
very new to al this.
If you have to work with the asoundrc, JACK will be easier on
every modern system, that I know off. It will take care of different bit depth
automatically. Maybe give it a try at some point. If you like graphical user interfaces
qjackctl is a good companion to look at connections and/or make them yourself.
...
Ta-ta
----
Ffanci
* Homepage: https://freeshell.de/~silvain
* Twitter: http://twitter.com/ffanci_silvain
* GitHub: https://github.com/fsilvain
11:27 a.m.
On 01/04/2016 08:15, Ffanci Silvain wrote:
Ben Edwards, Apr 1 2016:
...
So made ~/.asoundrc
pcm_slave.sl3 {
pcm "hw:1,0"
channels 2
rate 44100
}
pcm.complex_convert {
type plug
format S16_LE
slave sl3
}
but got
pi@cuberadio:~ $ arecord -t wav -r 44100 -c 2 -f S16_LE -D
complex_convert mon.wav
ALSA lib pcm_plug.c:1261:(_snd_pcm_plug_open) Unknown field format
arecord: main:722: audio open error: Invalid argument
;(.
| Not sure exactly what S16_LE. Cant find a list of the formats. Or is
this the format of the card, not the format I want.
I need to use a slave.
Yes, but I
haven't seen it like that, if it works though...
Is this correct?
pcm_slave.sl3 {
pcm "hw:1,0"
format S16_LE
channels 2
rate /44100 /
}
pcm.complex_convert {
type plug
slave sl3
}
Don't put the slashes around your sample rate. I'd normally put all
the sl3 code inside your complex_converter, where you said:
slave sl3
I would have written:
slave {
pcm "hw:1,0,0"
...
} S16_LE = signed 16bit Little Endian, which is what you
want. Take a
look at the manpage for arecord:
man arecord
then search for s16_le:
/s16_le
you will come to a full list of accepted bit depth/sample formats of
ALSA.
Its headless but I could ssh -X I guess. Ime just trying to get it to
work/take the path or least resistance. Don't mind taking a couple of
hours working this out but I do find the documentation for Linux stuff
makes my head spin, and I worked in It for over 15 years. Ime
basically now a creative, I do video production mainly. figured if I
could do it without installing extra framework that would be good. I
help at a local volunteer run venue/performance space,
http://cubecinema.com/ (Server offline currently as it is hosted onside
and power is down due to electrics needing total overall). This is what
i am trying to sort out this stuff for and trying to find time to do
it. OK, ime a bit lazy, my boss when I did IT said this was a good
thing, it means you try to find the easiest way of doing stuff;). I
wish I had a day or too to work fully through docs but its difficult to
find the time.
Regards,
Ben
Not against using jack but only if I have to. It seems more complex
and I am very new to al this.
If you have to work with the asoundrc, JACK will be
easier on every
modern system, that I know off. It will take care of different bit
depth automatically. Maybe give it a try at some point. If you like
graphical user interfaces qjackctl is a good companion to look at
connections and/or make them yourself. ...
Ta-ta
----
Ffanci
* Homepage: https://freeshell.de/~silvain
* Twitter: http://twitter.com/ffanci_silvain
* GitHub: https://github.com/fsilvain
--
*Ben Edwards, Video Editor/Colorist & Cameraman*
w:www.funkytwig.com t. 01179 118 144 m.:07773 02 44 82
skype:funkytwig twitter:@funkytwig
PGP Public key available from pgp.mit.edu
If you are a freelancer FreeAgent is a great system to do your accounts,
if you use http://www.freeagent.com/?referrer=42j4d743
(referral code is 42j4d743) you get 10% off each month.
11:47 a.m.
Ben Edwards, Apr 1 2016:
...
You can work JACK connections without
graphics. It's one more framework and if the ALSA setup does, what you need, run with
it. But if not, JACK will allow you more flexible routing with a lot less hassle.
...
Ta-ta
----
Ffanci
* Homepage: https://freeshell.de/~silvain
* Twitter: http://twitter.com/ffanci_silvain
* GitHub: https://github.com/fsilvain
So made ~/.asoundrc
pcm_slave.sl3 {
pcm "hw:1,0"
channels 2
rate 44100
}
pcm.complex_convert {
type plug
format S16_LE
slave sl3
}
Remove the "format S15_LE" from the pcm.complex_converter block and
try again. Though I'm not even sure, if you need it inside your sl3 block. First try
without it inside the complex_converter and if that doesn't work, try without it
inside the sl3.
...
If you like
graphical
user interfaces qjackctl is a good companion to look at connections and/or
make them yourself.
Its headless but I could ssh -X I guess. Ime just trying to get it to
work/take the path or least resistance. 
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days inactive
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days old
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6 comments
3 participants
participants (3)
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Ben Edwards -
Clemens Ladisch -
Ffanci Silvain