How to edit a AC3?

[paramount]

I have a movie with AC3 audio muxed. (5.1)
When I demux the file, and try to import in DVD-Lab, it says that the AC3 audio is corrupted... and try to correct it.
But... when I watch the final movie, the audio is out of sync.
But in original ac3, before DVD-Lab "correct" it the audio is OK with movie.

So.. what I want? An editor, that I can open the original AC3 file, and save a new one. Maybe edit the file too... (I have an other avi file, with a blop in the first 20 seconds... and after this blop the audio get out of sync... but constant, maybe only removing the blop and adding a silence, it get OK.

I have tried a lot of softwares, Sony Sound Forge 9 (I can save a AC3 file, but can't open), Adobe Audition 2 (Can't open the file too), Sonic Audio Transcoder Dolby Digital (Only accepct wav, mp3 file, can't open a AC3, but can't Edit too... only convert).

Does Adobe SoundBooth CS3 do this?

Or someone knows a good software to open an AC3 file, and edit it? with a graphical interface (maybe like SoundForge) and high quality?
I don't wan't to transcode the AC3 to MP3 edit, and reencode to AC3... I'll have a quality loss.

[tebasuna51]

When you edit (graphically) an ac3 always lose quality when you reencode to ac3 (decode-edit-reencode).

Any decoder can be used if you don't use DRC or DialogNorm. Azid is free.

If you have Sound Forge 9 is recommended to edit 5.1.

And you need a good encoder (maybe the Pro with Sound Forge) and apply the same DRC and DialogNorm than the original or new ones if the edit is strong.

BTW, if you only need cut some fragments or add delays or silence fragments to sync, don't decode the ac3 use DelayCut without decode and maintain the quality.

[shon3i]

Maybe sound silly but Nero Wave Editor have ability to Edit multichannel AC3 files, and have god AC3 encoder, but always you can export to wav and then encode with other AC3 solutions.

Nero Wave editor is totaly similar to Adobe Audition, have very good filters and it's easy to use, you can edit all channels independed