I extracted Dolby digital 5.1(ac3) to 6 mono wav L R C LFE LS RS
and mixing my voice overs in channel C, then I Re-encode to Dolby digital with Dolby media producer suite. I listen re-encoded of Dolby ac3 and compare with Dolby ac3 original. I see audible degradation.
Hi. Please only use this forum for questions about the Dolby Atmos Production Suite going forward. Dolby Digital is a lossy codec for consumer formats. It is not designed to be decoded and re-encoded. Degradation would be expected. You should contact the owner of the content for the PCM source. Thanks, Adam Dolby Labs