Raspberry Pi doesn't come with an andio in jack. Audio in can only be supported using external USB sound card. I bought a Sound Blaster Play for this purpose. To enable USB audio output: sudo vi /etc/modprobe.d/alsa-base.conf And comment out line: # options snd-usb-audio index=-2 This will enable USB audio output by default. Reboot now: sudo reboot Now to record: arecord -D plughw:0,0 -f cd test.w