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Any particular lack of functionality that cause you not to be convinced by the Linux options? AFAIK, libsdrplay runs on Linux and allows complete control of the RSP1A.
It is mostly a question of presentation and usability - my requirements of an SDR package are not very high. Both SDRUno and SDRConsole have good user interfaces and fully exploit the functionality of the RSP1A.
Looking at it from the broader point of view, I guess that my problem with Linux is difficulty in implementing what I would describe as an "integrated PC controlled shack". On Windows, I run either MicroHAM or Win4ICOM which both implement port sharing, allowing me to have multiple applications connected simultaneously with the rig. On top of that, I run either Win4ICOM or FLRig to give me CAT control of the rig (I never touch the front panel controls). I run Log4OM V2 for logging which gets the frequency and mode from the radio via port sharing. I also run some combination of FLDigi, WSJT-X and JS8Call for digi-modes. I have an SDRPlay RSP1A connected to SDRUno to give me a high resolution panadaptor on one of the two wide screens connected to the PC - it locks to the rig over OmniRig and I can see signals on the panadaptor screen, point to them with my mouse, click and the rig tunes to them. I run a DX cluster client (these days I use the one built into Log4OM) and, again, can tune to a reported DX station with a simple point and click.
Now, I'm sure that people will come along to tell me that this can all be achieved under Linux, but I have tried - twice now - and it is very difficult to get full coverage. Under Windows, it is easy - a standard set of applications that all cooperate with little effort to produce a very ergonomic integrated PC controlled shack. It was absolutely wonderful with Win4ICOM at the core, but Tom is not interested in building a version of that which works over CI/V and I simply cannot get the RF reliably out of the 7300 USB port!
Martin (G8FXC)