USB Microphone detected but not working on Jetson Nano

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

I have a USB 3 webcam with a microphone that is working fine on Windows and Ubuntu 18.04.05 Laptop. When I use it on the Jetson Nano the mic is detected but there is no sound at all, the bars on the sound settings do not move.

arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: tegrasndt210ref [tegra-snd-t210ref-mobile-rt565x], device 0: ADMAIF1 CIF ADMAIF1-0 []
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 1: tegrasndt210ref [tegra-snd-t210ref-mobile-rt565x], device 1: ADMAIF2 CIF ADMAIF2-1 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt210ref [tegra-snd-t210ref-mobile-rt565x], device 2: ADMAIF3 CIF ADMAIF3-2 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt210ref [tegra-snd-t210ref-mobile-rt565x], device 3: ADMAIF4 CIF ADMAIF4-3 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt210ref [tegra-snd-t210ref-mobile-rt565x], device 4: ADMAIF5 CIF ADMAIF5-4 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt210ref [tegra-snd-t210ref-mobile-rt565x], device 5: ADMAIF6 CIF ADMAIF6-5 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt210ref [tegra-snd-t210ref-mobile-rt565x], device 6: ADMAIF7 CIF ADMAIF7-6 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt210ref [tegra-snd-t210ref-mobile-rt565x], device 7: ADMAIF8 CIF ADMAIF8-7 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt210ref [tegra-snd-t210ref-mobile-rt565x], device 8: ADMAIF9 CIF ADMAIF9-8 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt210ref [tegra-snd-t210ref-mobile-rt565x], device 9: ADMAIF10 CIF ADMAIF10-9 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: PanaCast [Jabra PanaCast], device 0: USB Audio [USB Audio]
  Subdevices: 0/1
  Subdevice #0: subdevice #0

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image1920×1080 347 KB

3

Hi,
It looks like the device is detected:

4

it is not recording. No sound

5

If you monitor “dmesg --follow” prior to attempting record, does anything show up in the logs as you start the record command? Is there any kind of error, or does it “just not work”?

6

Hi,
We try with Logitech HD Webcam C615 and can record by running this command:

$ arecord -D hw:2,0 -c1 -d 10 -r 48000 -f S16_LE a.wav

Please try the command with your device.

7

Thank you @DaneLLL and @linuxdev for your reply. This is the error I get when I use
arecord -D hw:2,0 -c1 -d 10 -r 48000 -f S16_LE a.wav

arecord: pcm_read:2103: read error: Input/output error

and sometimes I get

arecord: main:788: audio open error: Device or resource busy

Also please see attached the output of dmseg --follow.

I tried the same arecord command with the same camera on my ubuntu 18.04.5 laptop and it works perfectly, no problem. But I can not figure out why on the Nano it does not work.
dmseg.txt (62.3 KB)

8

Hi,
Is the laptop kernel-4.9? Probably the device needs newer kernel.

Does the camera work?

9

The Laptop kernel version is 5.4.0-77-generic
The camera works on both the laptop and the jetson. Can I update the kernel on the Jetson or will it have issues ? Or is there another solution ?

11

No, we don’t know if able to do, and suggest to contact with vendor or find another USB microphone.

12

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