What program will trim audio using .avs script

[Stress_analyst]

My audio source file is from a satellite and is either a 2ch mp2 or a 6ch AC3.
I need to trim the files and I was wondering if the following method is correct. I think that this is working with the mp2 but what about the AC3? What is the equivalent AC3__wave in Besweet? Is it 5.1WAVE or AC3WAVE?
I’d like the final product to maintain the quality of the initial audio file.
Please note that the final files will be used in a DVD.

Method 1 mp2
mp2>>wave_stereo (besweet)>>Trim and output to mp2 (Tmpeg)>>wave_stereo and input delay (besweet)>>AC3 Sonic Foundry

Method 2 AC3
AC3>>please fill in what kind of wave (besweet)>> Trim and output to mp2 (Tmpeg)>> please fill in what kind of wave (besweet)>>AC3 (Sonic Foundry)

If there is a guide please point it out. I haven't found the right one yet...

Thank you
The Analyst

[Stress_analyst]

Hi all
Is there a program that I could use to accurately trim a wave audio file without encoding? I just want to edit-trim the wave file using the avisynth script and export the same but trimmed wave file. I would like to use as an input my avisynth .avs script, so I can have the same editing points between audio and video.
I know that cce 2.5 is not doing a good job with audio and tmpg will resample and encode the wave to output an mp2.
Or is there a program that will allow an accurate audio editing (only) using exact frame numbers?
Thanks,
The Analyst

[DSPguru]

http://BeSplit.doom9.org

[Stress_analyst]

Thanks DSPGuru

BeSplit to trim and BeSweet to join.
I didn't know about Besplit.
These are great tools.

I do wonder what are the differences between trimming in Besplit and joining with BeSweet, or using VDubMod for trim and join. It looks like that VDubMod will handle mpx, wav, and AC3 in a direct stream copy...
But you are the audio expert. I will use your tools till I get a better understanding of the VDubMod audio processing (I might ask in their forum).

Thanks,
The Analyst