Audio Input on Jetson TK1

I’m having trouble getting the microphone input to work on the Jetson. I’ve tried adjusting the levels on the ‘System Settings’->Sound Input panel (Analog Input tegra-rt5639) but get no input signal. The cables and mic seem to work ok on another system, but nothing happens on the Jetson. Is there some lower level device setup I have to do to get it to work? Thanks.

Hi Kangalow,
Can you please try recording after doing these settings through terminal?

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

Please do revert back with your observations.

Hi rpaliwal,

It works! Thanks so much for your help.

Kangalow

Glad I could help! :)

Hello All,

I need to record audio data via microphone on TK1 board.

May i know which small size microphone suitable for the TK1 for audio recording data?

I couldn’t name a specific microphone, but most any of the 3.5mm jack microphones would work. I have one from an old pair of headphones I’ve used, but I don’t even know what brand it is (the mic is a separate clip-on mic and the headphones themselves died years ago). I’d look for microphones advertised for gamers.

Hello Guys,
Do you have any idea that Dual stereo USB camera has inbuilt microphone?

for example: https://www.aliexpress.com/store/product/Synchronization-Megapixel-MJPEG-YUY2-150degree-Wide-angle-dual-lens-USB3-0-720p-Hd-Cmos-Camera-module/2135153_32643536212.html?spm=2114.12010612.0.0.KdgPlN

Hello Guys,

I’d like to test “audio input” on my TX2 board…but, I don’t know how to connect microphone to TX2.
Could you let me know the pin connection to use microphone on TX2?

thanks a lot…

Best Regards,
HJ

You probably want to post in the TX2 forum instead of the TK1 forum:
https://devtalk.nvidia.com/default/board/188/jetson-tx2/

The easiest thing to do is get a USB microphone (a USB headset does this quite well since it also has stereo speakers).