@bagheera1
there's something I'm missing.
1. I'm suggesting to add the avs file as input title in main window, not to copy&paste the avs script in 'Title Edit'/'AviSynth'. If you add the avs file as input, then Import() is used. Eventually other avisynth filters are added to reflect the preferences/project settings.
2. Talking about script editing in 'Title Edit' section. If you edit the script ('Auto AVS Script' is off and text become red), then go back to the audio tab and change the bitrate, script simply
cannot revert back. It remains modded and red.
Please clarify your request, because I think that the solution is already there.
Bye