the 24 in 2400 has nothing to do with the ADC/DAC bit depth. the ADC/DAC is 24bit. The internal processing varies between 12/16 bit for the “classic” mode and 32 bit for the “HiFi” mode. the DAC is not R2R and you wouldn’t hear the difference anyway…
Interesting. Well the 12 in SP-12(00) had to do with it being 12-bit so it seemed obvious that the S2400 which initially was named SP-2400 and was planned as a 24-bit sampler took its name from there. I mean why else would it be called that?
FWIW I think the S2400 sounds amazing and I’m a vintage sampler enthusiast. Anything else you care to share about the converters, summing, signal path?
As for the R2R not making a difference, I guess so on a 24-bit DAC. Much more so though on the OG 12-bit DAC I reckon…