Correcting Audio Overages

[ADigitalMan]

I have a certain title in my collection that I've been working on. The source is 4:3 and has 2-CH AC3. I've been upconverting the video to 16:9 (with decent results) and mixed in some extra lines into the AC3 file. In order to do that, I converted the AC3 to WAV, opened in Vegas, and mixed in the four lines.

I then exported to PCM so the file wouldn't suffer a second compression.

Strangely, the PCM "pops" the speakers in a few particularly loud spots (explosion sound effects). I'm guessing in this spot, the audio somehow developed an overage. Given that the audio was only normalized (which it seemed did nothing) and was otherwise untouched (except for the four aforementioned lines), what would cause these overages? Is there a filter I can run my remixed PCM file through that would correct the levels to remove these overages without otherwise mucking with the original sound mix?

[jsmithepa]

U normalized it and it still pops???

[lordsmurf]

GoldWave has some filters I would use on this. It's apparently intended for removing pop/clicks for vinyl transfers, but it works well on a wide range of problems.