Builds on 0.99.40 (the patch view as the main view) and adds the Airspy fixes a tester asked for.
Airspy R2 and Mini: one gain mode at a time. The Source panel now offers Sensitive, Linear or Free, as Airspy's own software does, and shows only the chosen mode's controls: one Gain slider for Sensitive and Linear, LNA / MIXER / VGA with their own LNA AGC and Mixer AGC switches for Free. Before, all five gains were drawn at once and moving one rewrote the others. The gain tables are the same as Airspy's own library.
Airspy decimation. A new Decimation choice (None, 2, 4, 8, 16, 32 on an R2; up to 64 on a Mini) lowers the rate the rest of FoxSDR works at, which saves CPU and narrows the band shown. The Rate list shows the rate after decimation, with a line saying what the radio itself runs at. Gain mode, both AGCs and decimation are remembered per radio. The patch page's radios are not decimated.
Less CPU at high sample rates, on every radio. At 4 MS/s and above the channel filter is now built in stages instead of one large filter at the input rate. For an Airspy at 10 MS/s this cuts the channel filter's cost by about a third, with the same audio; if a fast radio's sound broke up on a slower computer, this should help. Below 4 MS/s nothing changes. At 50-64 MS/s with a wide filter, the old filter reached its size limit and let some interference through; the staged filter removes it.
Existing Airspy users keep their settings: they open in Free mode as before.
Nothing here has been tried on a real Airspy yet (there is none on the development desk) - reports from Airspy owners are very welcome, through REPORT A BUG / DISLIKE or the tester page.
SHA-256 of foxsdr-setup-0.99.41.exe:
90b2b6fa656266d0ae05d28ebbc757c627c90ba803fcc473cc45ad5d841f8d7e
SHA-256 of FoxSDR-0.99.41-x86_64.AppImage:
590063f17395a91e73c7d6911c2876aa67b06c0d410d2545d45ea90c6f2e3741
SHA-256 of foxsdr-0.99.41-linux-x64.tar.gz:
fa82a3340edee7e4c7c50f87c5975e1ca363e518c600ba2c1ff30166c9a851a3