Inexpensive AV Processor with bypass

Hi, I currently have a 5.1 system centred on an old Primare P30 processor. Unfortunately t does not properly decode Dolby Digital + or Atmos. I would prefer not to have to replace the processor.

Q1: is there any device which can convert Dolby Digital + and Atmos into old-fashioned Dolby Digital?

Q2: in order to maximise audio quality my system has a separate high quality DAC which, for music, feeds through the processor in bypass mode, thus avoiding conversion of the analogue signal back to digital. Is their an inexpensive processor which has: Dolby Digital, Atmos, and a similar bypass mode? Balanced XLR connections preferred. Sound quality need not be top notch, as it´s for movies only, not my priority. Thanks!