I want to use Airspy mini & Spyverter with Gqrx. How to I get the frequency to display properly? Anything to do with "decimation" setting? What should it be set to?
When you open Configure I/O devices (PCI card icon or under File), adjust the LNB LO to the appropriate value for your up-converter. I'm assuming its there for an Airspy device, don't have one to test that the LNB LO option is available for it.
When I needed to add my Airspy HF+ to GQRX, I had to add the libairspyhf1 package to Linux Mint via Synaptic. You might have to do something along those lines maybe?
GQRX is gnuradio based and will therefore work with gr-osmosdr, and any hardware that driver supports. In general you're going to need the libairspy0 package installed as well as gr-osmosdr.