"The digital interface"
You get roughly 6 dB of dynamic range for every bit you add. 20 bits is then about 120 dB of dynamic range.
A lot of electronics today will have trouble hitting this number.
Given that even the best rooms have noise floors of 40 dBa and you can start to see why 20 bits starts to be a very practical limit.
24 bits would be 144 dB dynamic range. Not going to happen realistically in a home environment, even taking into account the fact you can hear stuff below the broadband noise floor.
This is an over simplification of what is going on, but should give you some perspective.
Tom
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Main System:
Amati Futura Mains
Amati Homage VOX Center,
Proac Response 1sc Rears,
Three MC2301's for L,C,R
MC 602 for the rears
C 1100, MX 151, MCD 1100, MR 80
Nottingham Dais with Wave Mechanic
Sumiko Palo Santos Presentation
SurfacePro 3, RPi 4, ROON, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC
MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material.
Lake House:
Ohm F, MC 275V, C2300, MR 77, Rega P3
OnDeck:
McIntosh MAC 4300v
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