bionic (1) alsa_loopback.1.gz

NAME

       alsa_loopback - loop back the first two channels of a alsa device to another device

SYNOPSIS

       alsa_loopback playdev captdev fsamp frsize nfrags

DESCRIPTION

       This tool is mainly for testing whether a given soundcard works with the zita-alsa-pcmi library.  It will
       send the 1st two channels of the given capture  device  to  the  playback  device,  using  the  specified
       settings.

       Note,  that  this  might  give  massive  (ear  and equipment damaging) feedback if your capture device is
       connected to a microphone near some speakers connected to the playback device.

ARGUMENTS

       playdev
              ALSA playback device (e.g.: hw:0)

       captdev
              ALSA capture device (e.g.: hw:0)

       fsamp  Sample rate (e.g.: 48000)

       frsize Period size (e.g.: 256)

       nfrags Number of fragments (e.g.: 2)

EXAMPLES

       This will loopback the 1st two channels of hw:0 to hw:1 using 48kHz samplerate,  and  10  fragments  each
       2048 samples.
         alsa_loopback hw:0 hw:1 48000 2048 10

AUTHOR

       zita-alsa-pcmi was written by Fons Adriaensen <fons@linuxaudio.org>.

       This  manual page was written by IOhannes m zmoelnig <zmoelnig@iem.at> for the Debian project (but may be
       used by others).

                                                    July 2013                                  zita-alsa-pcmi(1)