Post-ADC.
Thanks. So is there a nominal fixed amount of gain the signal goes through in the analog domain before it hits the ADC?
If you look at the diagram in the patent application, it shows separate analog gain/filter stages prior to each ADC ("lowest gain stage", "mid-gain stage" and "highest gain stage"). Maybe the actual implementation differs in some way, but I think it is not unreasonable to assume that is how it works in the MixPre IIs.
^ I assume that is for 32-bit mode and not 24-bit mode (why would you need analog limiters otherwise)?
Related question - is the gain stage applied to slightly different places in the chain depending on if it is in 24-bit fixed or 32-bit float mode?
I was explicitly told by a Sound Devices tech that, in the first generation MixPres, there was an analog gain stage at the pre-amp and a digital gain stage after conversion (i.e. analog gain, or trim, and digital fader). Perhaps that is different in the second generation, but I doubt it. The specs list the mic input overload as "+14dBu (limiters on or off)", which is unchanged from the first iteration. Analog limiters don't really make sense, at least to me in my non-audio engineer brain, if they have no effect at the input. Maybe I am missing something, though...