I use a similar folder naming scheme as what others have mentioned here for my flac (& other) conversions.
Artist - Year - Album (channels codec sample-rate bitdepth source)
example:
Jim Croce - 1973 - Life and Times (4.0 flac 96kz-24bit QdLP)
Within the metadata of each song I have extra info such as SQ, QS, CD-4, catalog number, etc.
I also create custom folder icons that show what the source is along with the codec, etc. So my quad reel rips have a custom pic of a quad reel, eight-track, blu-ray, etc. They also show up like this within Foobar.
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