Audio delay in VirtualDubMod 1.5.10.1

I have an AVI, which i like to put together with an AC3 stream (AC3 T03 3_2ch 384Kbps DELAY -272ms.ac3). I set the correct delay value (-272ms) in Audio Skew Correction and set the correct Preload/Interleaving value (160/160ms) in Audio Block Placement. So far so good. Then I save as AVI. But if I later open the file in VdubMod and want to edit and cut the new AVI file, do I then have to set the Audio Skew Correction and Preload/Interleaving values again for the AC3 T03 3_2ch 384Kbps DELAY -272ms.ac3 stream, or have the two streams (AVI/AC3) been "melt" together for good?

Audio 

Thx alot Matthew :-) Just have one question more. Do the same thing apply for the Preload/Interleaving value? Noticed that standard is 500/1, so would that interfear when cutting once again, or can I just ignore that setting (maybe by turning off audio/video interleaving)? PS. What does "offset audio to maintain a/v sync" do?

Interleaving/preload affects how the streams are muxed. So as long as you are not separating the audio and video streams when doing your editing then you shouldn't have a problem. You shouldn't need to fiddle with any of the streamlist settings if you are just cutting the avi. The offset audio thing I imagine would just do what I said in my previous post, chop the audio or add 0s. To be honest I'm not sure what would happen if you uncheck it ;o I'm much more into demuxing avis, rather than creating them =) BTW if I recall correctly 500/1 is only appropriate for muxing mp3. AC3 requires different settings, can't remember what they are, but they should be obtainable via the search. If you get them wrong you may get playback issues like desync. The interleaving settings won't change one byte in the audio and video streams themselves, so you can always demux/remux later if the settings turn out to be troublesome.