So I've finished my project, applied audio filters (Denoiser) to get rid of the hissing sound. Worked flawlessly. Sounds great in my project, but once exported the hissing returns at the begining of each new audio clip. The sound gets perfect again after a second or two but reverts to the pre-filter sound each time a new clip comes in.
So is there a fade in-out for the audio filter? I can't find one (and why would one want one). Doesn't matter how I export, to any file type, always the same, brief original audio which gently fades back to the perfect-filtered audio.
Again, sounds perfect all the way through in my project, but not after rendering. Any ideas?
This is a known issue with certain audio filters in PP. The recommended solution is to process those audio files in Audition instead.
And do file a bug report.