Which program to use for fine-tuning audio streams?

[elenhil]

I want to combine two audio streams from different film versions (one in English and another translated into another language) into a single file. The problem is that one version is PAL and the other is NTSC, and somehow BeSweet's OTA frame rate conversion fails to create a fully time-synchronized version. That is even with correctly synchronized beginning the two streams gradually get out of sync near the end by some two seconds or more.

Another task is simple one-point synchronization without scaling in cases where both streams have the same frame rate.

So I think I need some sort of visual audio editing program where I could make precise synchronization of two audio streams (which must be quite simple given the fact that there are non-speech sounds which are similar in both original and translated versions and which should provide reliable sync points). That is visual beginning and end synchronization with consequent scaling.

The difficult part is that both streams are AC3, so neither Adobe Audition nor Adobe Premiere fit.

[Skelsgard]

It sound to me that u will be forced to decode to WAV in order to achive the visual sync u want since there is no software capable of AC3 editing, just encoding.
Decode the AC3s to WAV format and check if there is in fact a sync problem between files. Then decide if u want to make the reencoding.