Oleg, what you said may be the clue to my previous observations. I still use 2 SD cards: your`s 0.20.1 and Georgy`s 0.23r0 - changing and comparing. I love all Georgy`s new features, especially FT8 TimeSync and waterfall preservation between switching vfo or band, but his spectrum and waterfall speed is visually slower (maybe 400 to 800 side effect?). Lowering Georgy`s `Spectrum Beta` from 70 to 40-30 makes speed similiar but not the same. Also noticed Georgy`s S meter always shows background +S1 comparing to yours.
