2 Mic Hat on Jetson Nano

Products & Technology ReSpeaker
#1

Having challenges to get 2 Mic HAT working on Jetson Nano

In step 2, I run the command:
KBUILD=/usr/src/linux-headers-4.9.140-tegra-ubuntu18.04_aarch64/kernel-4.9 make all_jetsonnano

And the output starts with this seeming like errors:
ls: cannot access '/lib/modules/4.9.140-tegra/extra/seeed': No such file or directory ls: cannot access 'overlays/bb/*.dtbo': No such file or directory ls: cannot access '/lib/modules/4.9.140-tegra/extra/seeed': No such file or directory ls: cannot access 'overlays/bb/*.dtbo': No such file or directory

I contiunued with rest of the steps, and there were no errors on those. After install and reboot, my arecord -l shows this:
arecord -l **** List of CAPTURE Hardware Devices **** card 1: tegrasndt210ref [tegra-snd-t210ref-mobile-rt565x], device 0: ADMAIF1 CIF ADMAIF1-0 [] Subdevices: 1/1 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

dmesg has these errors:
tegra-asoc: sound: ASoC: CODEC DAI wm8960-hifi not registered [ 8.433244] tegra-asoc: sound: snd_soc_register_card failed (-517) [ 8.442852] tegra-asoc: sound: ASoC: CODEC DAI wm8960-hifi not registered [ 8.453269] tegra-asoc: sound: snd_soc_register_card failed (-517) [ 8.463776] tegra-asoc: sound: ASoC: CODEC DAI wm8960-hifi not registered [ 8.472494] snd_soc_wm8960: loading out-of-tree module taints kernel. [ 8.482725] tegra-asoc: sound: snd_soc_register_card failed (-517)

Any pointers?

#2

Nothing exceptions. Please try to run the Capture & Playback command for a few more times.

Here is the output of ‘aplay -l’ after a successful instatllation.
card 1 is the Sound Card connected to wm8960 codec.
Be different with RPi, word wm8960/seeed-voice-card do not appear all the time.

peter@PeterJetson1:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: tegrahda [tegra-hda], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
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
#3

Output of arecord and aplay won’t show correct device names? Are there plans to improve this? And any other limitations should we be aware of when compared to 2-Mic HAT performance on Raspberry Pi vs Jetson Nano?

#4

Yes the Mic works but the performance is not the same as it is on a Pi. The gain levels are not optimal and it only works if I choose “mono” mode on the sound settings. Are there plans to officially support this hardware with all features working on the Jetson Nano?

#5

Have you had any luck getting this to work? I’m running into the same issue. I have code that works great with the 2 Mic array on a Pi. I’m looking to switch the whole thing to Nano but the audio quality is poor enough to be unusable for my purposes.