I'm not sure what i'm doing wrong but...Editing in Avid xpro, exported a clip with very hissy audio into audition. Exported as an avi and then imported unto audition thru extract audio from video. I then applied the hiss filter. Great! sounds much better. Saved and then imported back to avid. Sounds like crap! crackly, static, icky. Go back to audition play the clip sounds beautiful (or at as good as it will sound shot by someone who doesn't know what they're doing...not me). Am I missing something. I used the manual and a fox pro book to get the mechanics down. I'm very new to audition. I'm editing in xpro 4.6 if it makes any difference
I'm not overly familiar with Avid, but perhaps you're saving the file as a 32-bit WAV. I've found that 32-bit WAV and AIFF support is not handled the same in all applications. Maybe try exporting the cleaned-up file as a 16-bit WAV and see if Avid can import that properly.