RSP1A + MiriSDR or SoapySDR source: nothing but noise

[maxpoulin64]

I've been trying your build trying to get away from libsdrplay. I'm on ArchLinux, using your libmirisdr5-git and soapymiri-git packages and a genuine SDRPlay RSP1A that works "fine" with the official libsdrplay + SDRPlay source (for what that crappy API design can do at least).

When using the Mirisdr source in SDR++, I get nothing but noise on all bandwidth and gain levels:

The gain sliders are also being super weird, only the main one works at all. It's also missing a few of the features like the FM/MW and DAB notches that are present on the regular SDRPlay source:

When using the SoapySDR source instead, it kind of works but the settings are very buggy. I have to turn the gain all the way up for radio to decode, despite signal being good in the spectrum view. I have to basically max out the gain for broadcast FM to work at all. It's also a bit stuttery and distorted, as if the samples were coming in slower than they should. I tried Gqrx for comparison and have the same behaviour, but it also appears that the signal is always offset as well.

miri_fm appears to be working okay, although I never had much success with the _fm tools to play correctly, but it seems to tune to the right place.

I'm not sure if this is the right place to open this bug or if it belongs to libmirisdr5.

Let me know how I can help troubleshoot this! I'd really rather use an open driver, and at a glance libmirisdr5 is a lot less buggy than libsdrplay and their weird proprietary server that crashes whenever it pleases.