sdr

 msi.sdr: sdrplay

https://groups.io/g/SDRPlayUsers/topic/rsp1_on_ubuntu_20_04_no_joy/91588947

https://github.com/pothosware/SoapySDRPlay3/wiki#troubleshooting

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rtl-sdr: https://www.rtl-sdr.com/V4/ #Linux (Debian)

sudo apt-get install libusb-1.0 

 1412  sudo touch /etc/modprobe.d/rtl-sdr.conf

 1417  sudo touch /etc/udev/rules.d/20.rtlsdr.rules

 rtl_power -f 25M:30M:5k 25M.30M.5k.csv

https://github.com/dernasherbrezon/rtlSpectrum?tab=readme-ov-file