connecting a microphone via USB

[tad]

Dear Armin,

Thank you very much for your support.

I mapped the device as /dev/snd:/dev/snd.
After that, I entered below from the console.
That means Linux detects a device with integrated speaker and microphone (Jabra SPEAK) as 'Bus 001 Device 007'.
But, arecord doesn't recognize this device.

root@raspberrypi:/# lsusb
Bus 001 Device 007: ID 0b0e:0420 GN Netcom Jabra SPEAK 510
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
root@raspberrypi:/# arecord -l
**** List of CAPTURE Hardware Devices ****
root@raspberrypi:/#

If 'hilschernetpi/netpi-raspbian' is deployed on a commercial Raspberry Pi with Docker, the USB device is recognized only by enabling a privileged mode.

pi@testmic03:~$ arecord -l
**** List of CAPTURE Hardware Devices ****
card 2: Microphone [USB Microphone], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
pi@testmic03:~$

Do you think netPI has some limitations for microphone input?

Thank you very much for your support.
Best regards,