Audio Testing - Embest SBC8600B Quick Start Manual

tmpfs
/dev/sda1

6.8.9 AUDIO Testing

The board has audio input and output interfaces. Users can enter the
following instructions to test alsa-utils audio player and recorder in the file
system:
1. Audio Recorder Testing
Plug in a microphone to test the audio recorder.
root@SBC8600:~# arecord -t wav -c 1 -r 44100 -f S16_LE -v k
Recording WAVE 'k' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono
Plug PCM: Route conversion PCM (sformat=S16_LE)
Transformation table:
0 <- 0*0.5 + 1*0.5
Its setup is:
stream : CAPTURE
access : RW_INTERLEAVED
format : S16_LE
subformat : STD
channels : 1
rate : 44100
exact rate : 44100 (44100/1)
msbits : 16
buffer_size : 32768
period_size : 2048
period_time : 46439
tstamp_mode : NONE
period_step : 1
avail_min : 2048
period_event : 0
start_threshold : 1
stop_threshold : 32768
silence_threshold: 0
silence_size : 0
boundary : 1073741824
......
2.
Playback Testing
Plug in a headphone to listen to what you recorded.
250.6M 3.0M 247.6M
99.2M 3.3M 95.9M
1% /media/ram
3% /media/card
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