Re: [Alsa-user] combine usb microphones
On Fri, 15 Apr 2016 13:52:28 + (UTC), joop wrote: >Hi all, > >i have 4 usb microphones connected to my system that i would like to >combine into one virtual 'sound card' with 4 seperate mic channels. > >i've researched this but could not find an answer... > >what would i put in my .asoundrc? I don't know, but using 4 mics as one virtual sound card, without sync, leads to nothing. Maybe this is useful: http://kokkinizita.linuxaudio.org/linuxaudio/zita-ajbridge-doc/quickguide.html I don't know, but you at least need some kind of hardware sync or software resampling. -- Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
[Alsa-user] combine usb microphones
Hi all, i have 4 usb microphones connected to my system that i would like to combine into one virtual 'sound card' with 4 seperate mic channels. i've researched this but could not find an answer... what would i put in my .asoundrc? arecord -l List of CAPTURE Hardware Devices card 0: device_1 [Usb Audio device], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: device [Usb Audio device], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 card 2: device_2 [Usb Audio device], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 card 3: device_3 [Usb Audio device], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 many thanks! joop -- Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] speaker-test works but a aplay does not
Hauke Westemeier wrote: > The differences to the values prompted in the error of > aplay /usr/share/sounds/alsa/Front_Right.wav > seem to be the number of channels and period_size and buffer_size. > If I just run speaker test with one channel (default) > speaker-test -t wav > I also get a similar error like aplay: > ... > Unable to set hw params for playback: Invalid argument > > So the problem seems to be the number of channels. I therefore tried > to also set it explicitly for aplay but > aplay --channels=2 /usr/share/sounds/alsa/Front_Right.wav > still didn't work and gave "CHANNELS: 1" in the error. aplay always uses the actual format of the file. The plughw plugin (which is also used by the default device) automatically converts to a sample format that is (claimed to be) actually supported by the hardware. Try running this program: http://download.atmark-techno.com/misc/demos/usb-audio-a500-howto/hw_params.c Does it report one channel? Regards, Clemens -- Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] speaker-test works but a aplay does not
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 The content of /proc/asound/card0/pcm0p/sub0/hw_params is just "closed". This is as expected as the HifiBerry card is card1, its parameters given in /proc/asound/card1/pcm0p/sub0/hw_params are access: RW_INTERLEAVED format: S16_LE subformat: STD channels: 2 rate: 48000 (48000/1) period_size: 32768 buffer_size: 131072 The differences to the values prompted in the error of aplay /usr/share/sounds/alsa/Front_Right.wav seem to be the number of channels and period_size and buffer_size. If I just run speaker test with one channel (default) speaker-test -t wav I also get a similar error like aplay: speaker-test 1.0.28 Playback device is default Stream parameters are 48000Hz, S16_LE, 1 channels WAV file(s) Rate set to 48000Hz (requested 48000Hz) Buffer size range from 16 to 131072 Period size range from 8 to 65536 Using max buffer size 131072 Periods = 4 Unable to set hw params for playback: Invalid argument Setting of hwparams failed: Invalid argument So the problem seems to be the number of channels. I therefore tried to also set it explicitly for aplay but aplay --channels=2 /usr/share/sounds/alsa/Front_Right.wav still didn't work and gave "CHANNELS: 1" in the error. I hope that there is a way to fix it because it is a bit wired, that I can play mp3 files etc but no simple wav files. Kind regards, Hauke -BEGIN PGP SIGNATURE- Version: GnuPG v1 iEYEARECAAYFAlcQn3UACgkQjz8jfoq989c71ACfdBx0K73m/ftMuKy+sgM/733B ijIAni5JGaQCWTxC4EUUQuu7rUboY94P =Yq18 -END PGP SIGNATURE- -- Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
