I'm trying to render a 1920x1080p 24fps project in SVP 13 and am experiencing significant audio quality issues. Audio is dropped (narration), background music volume diminished, and depending on what codec (or codec custom settings) I use, the overall dynamic range seems highly variable...

The issue arose after adding new hardware to my computor. I replaced the c drive a few weeks ago (it was about to fail) and added a geforce gtx 460 gpu. As part of the process of rebuilding my application files I added avid's dnxhd codec as I wanted to try rendering lossless files that I could recompress in handbrake (heard that the render quality was superior for vimeo up loads?...).

Since then I have tried to render projects using a number of codecs (avi, mov, wmv, and mp4-mainconcept avc/aac), and various settings (including changes in the custom options). While the audio issues express themselves differently (e.g. tonal changes, etc.) each time I always get the dropouts in the same places with lower audio quality generally.

I was rendering projects successfully prior to the c drive change over (including the one I'm trying to do now). I've gone through my vegas preference settings and everything seems as it should be...

However, when I play the project in Vegas off the timeline the problem occurs. When I play the rendered "post c drive" rendered files on VLC and microsoft media player, the audio issues show up identically. I've also tried dropping these same "post c drive" files in a new instance of vegas and played them off of the time line, and the problem was there too.

Not sure what to do next, any suggestions about what I can do to fix this problem?

Thanks for your help with this!