Using Vegas MS14 Platinum (trial at present) and exporting using any Sony AVC/MVC template to mp4 with AAC audio I find the audio is just noise.
This doesn't happen with Vegas MS13 where the AAC audio is okay.
With MS14 the same file exported with a template using Dolby AC3 is okay and exports using MainConcept mp4 with AAC audio are okay. It's just the Sony AVC/MVC AAC audio that's a problem.
Could someone please check to see if it's just me.