My band is working with a somewhat pricey mastering engineer and we are wanting to keep the price down. For a price we're comfortable with, he will either provide us with hi-res masters (24bit, 48khz - the recording quality), or with CD-quality masters + DDP file (16bit-44.1khz).
My gut is to get the hi-res masters, buy Triumph for $79, and do the conversion and create the DDP file myself. However, the engineer said he does a separate mastering pass for each quality he does.
My question is: what might necessitate a different mastering pass for the CD-quality version? What benefit might there be to getting the mastering engineer to do the CD-quality version instead of just converting it myself from the hi-res version?