elisa@PC-Casa:~$ arecord -D plughw:0,3 ~/prova3.wav
Registrazione in corso WAVE '/home/elisa/prova3.wav' : Unsigned 8 bit, Frequenza 8000 Hz, Mono
arecord: set_params:1297: Impossibile installare i parametri hardware:
ACCESS:  RW_INTERLEAVED
FORMAT:  U8
SUBFORMAT:  STD
SAMPLE_BITS: 8
FRAME_BITS: 8
CHANNELS: 1
RATE: 8000
PERIOD_TIME: 125000
PERIOD_SIZE: 1000
PERIOD_BYTES: 1000
PERIODS: 4
BUFFER_TIME: 500000
BUFFER_SIZE: 4000
BUFFER_BYTES: 4000
TICK_TIME: 0