Why does Audition indicate that it is working at 32-bit float for a 16/44 AAC file while it remains at 16-bit for the FLAC?
...almost certainly operates on 32 bit floating point values, so the output PCM is also 32 bit floating point. FLAC, on the other hand, is a lossless format, so the samples it outputs are identical to whatever were input into the encoder.
To clarify, you're bringing 32-bit float files in and editing them in 16-bit mode?
Working in 32 bit floating point, even if the original recording is 16 bit, is much more accurate...
dither bit depth 0.5 bitsp.d.f. shaped triangularnoise shaping C1
I've thought about buying a quartz-driven TT like a Technics. It would certainly make cleaning a record far easier
Digital is my preference over vinyl. Sometimes I find records (such as this one) that aren't badly clipped like the CDs and would rather listen to a digital copy of it.
Maybe one really doesn't need more than 16 bits (a phonopre/cartridge already contribute a good bit of noise, but I think I looked at spectra once and didn't considering dithering sufficient)...
...Be sure to contribute to the DR Database if you can (at least an offline scanner for Mac does exist, though I'm not sure what the pitfalls are - the old Windows version of the offline meter had some issues with metadata).
Are you sure...
Are you sure about Audition doing something at 32 bit with 16 bit files?
Another thing to watch out for: Correct speed. I was decidedly displeased when I found that my little Technics (an entry-level model, SL-BD20) played about 0.5% fast and, unlike the next model up the food chain, has no speed adjustments.