He also made a more concise post about it here: https://hydrogenaud.io/index.php/topic,77154.msg674643.html#msg674643.
I use a VST limiter/compressor that is user-adjustable and came with documentation I "grok" (latter attached FYI).
@shadowking, I tried the settings you suggested for WavPack, up to -b4.55x5s.5, and I still hear that hiss. Aggrrrhh! Since this sample sounds more like regular music than a proof of concept, I have a panic at the thought that other music could be compressed in such a low-quality way. So I suspend the use of the hybrid WavPack and hope that @bryant will be able to fix it.
BTW, since I have the version 0.5.0.1 of this component, would the configuration of this component be reset if I upgrade this to the latest version (currently v0.7.2.0) as it might have breaking changes down the line since the old version of this I've have?I took care to provide upgrade paths and conversion routines along the way. It's not pretty code but it should work.
Librempeg (better project than FFmpeg in any measurable way)