Pipeline, very interesting. But an encoding rate that low (48 kbps) isn't all that normal. Perhaps if you showed .WMA files at 128 or 196, it would be more representative of how folks make their compressed files?
BIAB 2021 Win Audiophile & 2020 Mac UltraPak. Software: Studio One 5 Pro, Adobe Audition CC, Notion 6; Win 10 64 Pro. Hardware: custom i7 16 Gb; Roland Integra-7, Presonus Studio 192, Presonus Faderport 8, Royer 121, Adam sub & monitors