Trouble with denoiser audio effect when exporting help!!!

Question

I have been working on a school assignment for media on Adobe Premiere  Pro CC and have come across a very frustrating issue that I have no idea about how to solve. it goes under the category of a 'technical difficulty'.
As I have alot of interviews and talking in my project for my Documentary I am shooting on Bullying for my Current Affair I have alot of audio to deal with and with my Rode VideoMic Pro when in conversation in the midst of an interview there is a constant 'hiss and crackle' that one can hear when watching hence I have used the audio affect of "DeNoiser" to get rid of this and it seems to work great on my workflow in my sequence in Premiere as I have reduced most clips to -15Db's. But when I export my project as I have done several times,the 'Denoiser' affect doesn't work for the first 3 seconds + for all clips that I have used to affect for. At the start of all the clips used with the affect there is a constant hiss and crackle and after 3 seconds it fades out??? Please help me with this very unusual problem as I want this to be a fantastic film on your fantastic software!
Thanks

Answer 1

Is the music on a separate track, or recording live during the interview?  Hopefully the music is separate, and if so then do the following:
In Premiere, right click on the audio clip that contains the voice and choose export to Audition.  Premiere will export the clip into Audition (and it will update on the timeline when saved in audition).
In Audition, highlight a piece of the clip that is noise only, (a sizable gap when there's no talking and only the ambient noise of the room is heard)  capture that as a noise print (right click, "capture noise print" or Shift-P).  Then in Effects, select the 'Noise reduction (process)" tool.  (Note:  I assigned a custom key for easy access as I use it frequently).  Then tweak the settings of the tool until it sounds good to you.   You can follow the settings I have posted above as a guide/starting point, but no two settings will work for every situation, (notice how I chose a logarithmic curve and added control points to follow its contour).
Personally, I don't try to remove all the noise, just tame it until the voice is dominate.  The more aggressive the reduction, the more unnatural the result.  A little ambiance is expected and sounds natural.   Even then, a little noise is masked when I go back in and add music.  You can play the clip in a loop while you make adjustments and go ahead, go the extreme to get sense for what each tool does, and then be subtle. Your ears are the best sense of measure.
Once your happy, select or highlight the entire clip and click apply.  Listen to the result.  If you're happy still, then save it and it will update in Premiere, and you grab the next clip and repeat the process.
Once you have all the voice clips edited, then you can add music.  I suggest that you keep the music at -12dB lower than the voice as a starting point.
You can also apply music via a ducking (side-chain) technique in Audition as another step.  To do so:
After fixing all the voice clips, mute any music tracks you have.  Create a new sequence and paste the sequence you've edited into that new sequence, right click on the audio track in that sequence and bring that into Audition like you did before.  What you'll have is all the audio clips assembled into one.   "Normalize" that freshly import track, ensuring even volume/peaking throughout, (to within -3dB) is a good target.
In Audition open a new mutli-session and choose the "VO with Ducking"  template.  Load that freshly imported audio onto the voice track (top), and add you select music in the track beneath it.  Dial down the volume of the music track until the voice sounds dominate (I try for a -12dB difference).  Double click the Dynamics Processing filter in the Music track and in the settings tab, check the link channels box and in the level detector area, adjust it's attack and release rate until it sounds good to you.
Then render a mixdown of the session, saving the result to a new audio file.  Import that file into Premiere, add it to a new audio track in your original edit and mute the other audio tracks.   Render away.