Jetson/Audio

Audio on Jetson TK1
Jetson TK1 has a Realtek ALC5639 HD Audio codec with the following connectors:
 * 3.5mm audio stereo output (eg: for speakers)
 * 3.5mm audio input (eg: for microphone)
 * HDMI digital audio (eg: for a TV).

Fixing the sound recording input
As mentioned on the forum, you might need to open a terminal and run the following to correctly configure sound recording on Jetson TK1:

amixer cset name="Stereo ADC MIXL ADC2 Switch" 0 amixer cset name="Stereo ADC MIXR ADC2 Switch" 0 amixer cset name="Int Mic Switch" 0 amixer cset name="ADC Capture Switch" 1 amixer cset name="RECMIXL BST1 Switch" 0 amixer cset name="RECMIXR BST1 Switch" 0 amixer cset name="RECMIXL BST2 Switch" 1 amixer cset name="RECMIXR BST2 Switch" 1 amixer cset name="Stereo ADC L1 Mux" "ADC" amixer cset name="Stereo ADC R1 Mux" "ADC" amixer cset name="Stereo ADC MIXL ADC1 Switch" 1 amixer cset name="Stereo ADC MIXR ADC1 Switch" 1 amixer cset name="Stereo ADC MIXL ADC2 Switch" 0 amixer cset name="Stereo ADC MIXR ADC2 Switch" 0 amixer cset name="IN1 Mode Control" "Single ended" amixer cset name="IN2 Mode Control" "Single ended" amixer cset name="Mic Jack Switch" 1