[alsa-devel] multi channels input and single channel out
List,
I have 8 channels of hdmi input and one channel output on my board. When arecord -f dat hdmi-rx.wav to store 8 channels data, aplay -f dat hdmi-rx.wav releases noise.
Ia there any way arecord stores each channel data to 8 different files? Or I have to do beam forming to sort 8 channels out by custom application?
Thanks.
---henry
On Fri, May 06, 2011 at 07:47:55AM +0800, hong zhang wrote:
List,
I have 8 channels of hdmi input and one channel output on my board. When arecord -f dat hdmi-rx.wav to store 8 channels data, aplay -f dat hdmi-rx.wav releases noise.
Ia there any way arecord stores each channel data to 8 different files?
check out the "--separate-channels" option for arecord. see if it meets your needs.
Or I have to do beam forming to sort 8 channels out by custom application?
Thanks.
---henry _______________________________________________ Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
"--separate-channels" option only allows two files for two channels. Interesting thing is plughw:0,1 -c 1 works only for one pin input (two channels).
plughw:0,1 -c 1 complains overrun for 6 channels (3 input pins) input.
--- On Thu, 5/5/11, Lu Guanqun guanqun.lu@intel.com wrote:
From: Lu Guanqun guanqun.lu@intel.com Subject: Re: [alsa-devel] multi channels input and single channel out To: "hong zhang" henryzhang62@yahoo.com Cc: "alsa-devel@alsa-project.org" alsa-devel@alsa-project.org Date: Thursday, May 5, 2011, 7:23 PM On Fri, May 06, 2011 at 07:47:55AM +0800, hong zhang wrote:
List,
I have 8 channels of hdmi input and one channel output
on my board.
When arecord -f dat hdmi-rx.wav to store 8 channels
data, aplay -f dat hdmi-rx.wav releases noise.
Ia there any way arecord stores each channel data to 8
different files?
check out the "--separate-channels" option for arecord. see if it meets your needs.
Or I have to do beam forming to sort 8 channels out by
custom application?
Thanks.
---henry _______________________________________________ Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
-- guanqun
At Thu, 5 May 2011 17:31:06 -0700 (PDT), hong zhang wrote:
"--separate-channels" option only allows two files for two channels.
No. You passed -fdat, right? "dat" format specifies 2 channels. Pass -c8 after -fdat.
Takashi
Interesting thing is plughw:0,1 -c 1 works only for one pin input (two channels).
plughw:0,1 -c 1 complains overrun for 6 channels (3 input pins) input.
--- On Thu, 5/5/11, Lu Guanqun guanqun.lu@intel.com wrote:
From: Lu Guanqun guanqun.lu@intel.com Subject: Re: [alsa-devel] multi channels input and single channel out To: "hong zhang" henryzhang62@yahoo.com Cc: "alsa-devel@alsa-project.org" alsa-devel@alsa-project.org Date: Thursday, May 5, 2011, 7:23 PM On Fri, May 06, 2011 at 07:47:55AM +0800, hong zhang wrote:
List,
I have 8 channels of hdmi input and one channel output
on my board.
When arecord -f dat hdmi-rx.wav to store 8 channels
data, aplay -f dat hdmi-rx.wav releases noise.
Ia there any way arecord stores each channel data to 8
different files?
check out the "--separate-channels" option for arecord. see if it meets your needs.
Or I have to do beam forming to sort 8 channels out by
custom application?
Thanks.
---henry _______________________________________________ Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
-- guanqun
Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
Yes, you are right. But 6 files (3 pins) size is same 4096 see following.
$arecord -f S16_LE -r 48000 -c 6 -D plughw:0,1 --separate-channels c1.wav c2.wav c3.wav c4.wav c5.wav c6.wav Recording raw data 'c1.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Channels 6
$ll c* -rw-r--r-- 1 root root 4096 2011-05-06 09:44 c1.wav -rw-r--r-- 1 root root 4096 2011-05-06 09:44 c2.wav -rw-r--r-- 1 root root 4096 2011-05-06 09:44 c3.wav -rw-r--r-- 1 root root 4096 2011-05-06 09:44 c4.wav -rw-r--r-- 1 root root 4096 2011-05-06 09:44 c5.wav -rw-r--r-- 1 root root 4096 2011-05-06 09:44 c6.wav
$aplay -f S16_LE -r 48000 -c 1 -D plughw:0,0 c1.wav
does not have sound.
Are my commands right?
--- On Fri, 5/6/11, Takashi Iwai tiwai@suse.de wrote:
From: Takashi Iwai tiwai@suse.de Subject: Re: [alsa-devel] multi channels input and single channel out To: "hong zhang" henryzhang62@yahoo.com Cc: "alsa-devel@alsa-project.org" alsa-devel@alsa-project.org, "Lu Guanqun" guanqun.lu@intel.com Date: Friday, May 6, 2011, 12:51 AM At Thu, 5 May 2011 17:31:06 -0700 (PDT), hong zhang wrote:
"--separate-channels" option only allows two files for
two channels.
No. You passed -fdat, right? "dat" format specifies 2 channels. Pass -c8 after -fdat.
Takashi
Interesting thing is plughw:0,1 -c 1 works only for
one pin input (two channels).
plughw:0,1 -c 1 complains overrun for 6 channels (3
input pins) input.
--- On Thu, 5/5/11, Lu Guanqun guanqun.lu@intel.com
wrote:
From: Lu Guanqun guanqun.lu@intel.com Subject: Re: [alsa-devel] multi channels input
and single channel out
To: "hong zhang" henryzhang62@yahoo.com Cc: "alsa-devel@alsa-project.org"
Date: Thursday, May 5, 2011, 7:23 PM On Fri, May 06, 2011 at 07:47:55AM +0800, hong zhang wrote:
List,
I have 8 channels of hdmi input and one
channel output
on my board.
When arecord -f dat hdmi-rx.wav to store 8
channels
data, aplay -f dat hdmi-rx.wav releases noise.
Ia there any way arecord stores each channel
data to 8
different files?
check out the "--separate-channels" option for
arecord.
see if it meets your needs.
Or I have to do beam forming to sort 8
channels out by
custom application?
Thanks.
---henry
Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
-- guanqun
Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
participants (3)
-
hong zhang -
Lu Guanqun -
Takashi Iwai