I would just work in the native format of the premaster (24bit ???kHz sample rate) and export it without dither, that is, unless you will hear an obvious benefit to upsample/SRC for higher fidelity.
I would just work in the native format of the premaster (24bit ???kHz sample rate) and export it without dither, that is, unless you will hear an obvious benefit to upsample/SRC for higher fidelity.