You're obviously correct - I want to do what you said! Slow down the audio, so it runs at the correct speed rather than time stretch it so it fits the slower and therefore longer video.
I notice that BeLight / BeSweet has Soundtouch / stretch built in, so I adjusted the rate to the figure you listed, but it now seems to be too slow.
How did you calculate that rate in the first place? I'm assuming it is something to do with the 4% speed difference, but other than that...
Annoyingly I had got the audio to be in sync, yet choppy, but now when I mux there various versions in Scenarist, none of them work anymore.
Conceivably, I can go back to my 'trimmed' transport stream, which I do believe I trimmed to start on the first I-Frame. From there I can demux the ac3, fix the ac3, convert the ac3 to a wav, trim the first 23 frames off the front which I have done within the encoder when I've converted the footage as it seemed to be 'grey', and then re-ac3 back out to author with.
Must. Keep. Going.