To put all such nonsense in contect - to achieve '24bit' resolution in the audioband (taken as 20Hz-20Khz) with full output at 'line level' (2vrms) basically requires the noise performance equivalent to the thermal (Johnson) noise of an unmolested 50ohm resistor at room temprerature.
IOW nothing in the real world, esp. of commercial audio gear, comes anywhere near. Forget it.
I'm genuinely interested to hear the answer as I'm sure can't be done with discretes, so calling them 'resistor ladders' is about as accurate as calling the ESS chip 32 bit just because it uses a 32 bit internal value description.