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lkrupp said:spheric said:
This is rubbish. The 3.5 mm analogue output of the MacBooks is perfectly capable of delivering 24-bit 96 kHz audio, and has been for at least half a decade.
There is nothing inherent to the 3.5 mm analogue jack itself that limits audio quality.
Apple may not support higher sample rates than 44.1 kHz at the moment, but the chips they've used since the iPhone 6 at least very likely do. Apple just choose not to support higher sample rates (not sure about whether they do 24 bits, but that really only affects the noise floor, so it's not really relevant except in controlled environments, where the iPhone isn't going to be used).
Really, the only thing Apple needs to do is to add Apple Lossless files to the iTunes Store — in 24-bit resolution if they wish. But going higher-resolution than lossless 24-bit/44.1kHz is complete nonsense.