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* To stop receiving data, press '''Ctrl+C''' in the listening device.
== Get sound in (audio in) ==
External Audio input devices, such as a powered microphone or the audio output of a PC or MP3 player, can be connected to the via a 3.5mm jack (Audio IN).
You can record audio in with the application arecord, for example:
<pre>arecord -t wav -c 2 -r 44100 -f S16_LE -v audio-in.wav</pre>
Following output is expected on console:
Recording WAVE 'audio-in.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
Plug PCM: Direct Snoop PCM
Its setup is:
stream : CAPTURE
access : RW_INTERLEAVED
format : S16_LE
subformat : STD
channels : 2
rate : 44100
exact rate : 44100 (44100/1)
msbits : 16
buffer_size : 15876
period_size : 1764
period_time : 40000
tstamp_mode : NONE
period_step : 1
avail_min : 1764
period_event : 0
start_threshold : 1
stop_threshold : 15876
silence_threshold: 0
silence_size : 0
boundary : 2080899072
When ever you think you want to stop recording just press CTRL+C
== Get sound out (audio out) ==
