The "L" in FLAC is for lossless.
Are they lying?
Huh?
FLAC is "Free Lossless Audio Codec"
Dynamic range (after recording) of 16 bits is above the threshold of human distinction, once ear physiology and noise is accounted for.
"The difference between 16 and 24 bit depths is not the accuracy in the shape of a waveform, but the available limit before digital noise interferes with our signal"
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https://www.soundguys.com/audio-bit-depth-explained-23706/It seems that normalized, even 16bits is a little overkill.
But, yeah, I do listen at 24/96, even 24/192 fairly often.
I'm not sure I ever hear a difference.
Not as much a difference as Columbian Coffee to Ethiopian