====== Ubuntu - Sound - Test Microphone ======

===== List of all microphone devices =====

<code bash>
arecord -l
</code>

returns:

<code bash>
**** List of CAPTURE Hardware Devices ****
card 0: Generic [HD-Audio Generic], device 0: ALC1220 Analog [ALC1220 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Generic [HD-Audio Generic], device 2: ALC1220 Alt Analog [ALC1220 Alt Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
</code>

==== Record a short 10 seconds audio ====

<code bash>
arecord -c 2 -r 44100 -f S32_LE -d 10 --device="hw:0,0" /tmp/test-mic.wav
</code>

Recorded audio via microphone specified by --device="hw:0,0" as in card 0 and device 0 from the arecord -l output in the previous step. 

----

===== Record a short 10 seconds audio =====

<code bash>
arecord -d 10 -f cd -t wav /tmp/test-mic1.wav
</code>

----

===== Confirm that the source was recorded correctly =====

<code bash>
aplay /tmp/test-mic1.wav 
</code>