I found that the hardware SRC was inferior to alsa's linear SRC which was inferior to mplayer's default SRC which was inferior to mplayer's resample fitler which was inferior to mplayer's lavcresample filter, which was still inferior to using an old Hollywood+ dvd decoder card purely for it's dolby certified SPDIF port.  ...
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ID Status▲ Resolution Sev Product Comp Assignee▲ Reporter Summary
49443 NEW --- maj Branch p yandex-b yabro toni.suvorov.15 Яндекс Браузер критично тормозит после загрузки
49649 NEW --- nor Branch p yandex-b yabro mosaudio Аппаратное ускорение кодек av1 в браузере

File a new bug in the "yandex-browser-stable" component of the "Branch p10" product