root@ubuntu:~# speaker-test -c2 -Ddefault -t wav
speaker-test 1.0.14
Playback device is default
Stream parameters are 48000Hz, S16_LE, 2 channels
WAV file(s)
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 2048 to 16384
Period size range from 1024 to 1024
Using max buffer size 16384
Periods = 4
was set period_size = 1024
was set buffer_size = 16384
0 - Front Left
1 - Front Right
Time per period = 2.686175
0 - Front Left
1 - Front Right
Time per period = 3.008061
0 - Front Left
1 - Front Right
Time per period = 3.008217
0 - Front Left
1 - Front Right
Time per period = 3.008265
0 - Front Left
1 - Front Right