Progressive noise reduction for beginning and ends of songs

[studer58]

I'm used to reducing background noise throughout a track (eg constant air-con rumble or fan hiss), but for a live session in an inner-city church, with just voice and grand piano (recorded together), I'm noticing some annoying traffic rumble only at the beginning and ends of songs (but thankfully not evident during the song)

Any ideas on how to progressively 'slide the noise reduction in' just at these times, but have it non-active for most of the rest of the song ? I'm guessing I'll be mostly using FIR or perhaps Waves X-Noise.

It could be that some simple frequency-specific 'shaving' might be all that's necessary, as the reverb tail of the last voice and piano notes die away into the church ambience...as the road noise become evident (perhaps only 2-4 seconds at the beginning and end of a song)

Thanks for any suggestions on how to accomplish this transparently and without drawing attention to the processing !

[jrk]

automate the effects "wet" parameter?

[Philbo King]

For the HVAC Noise:
Get a good sample of the noise. Use ReaFIR->Subtract->Build Noise Profile and loop the noise till the display stops changing. Untick Build Noise Profile.

Use Ctrl-Drag (for PC) to drag the graph up/down while listening to a low level passage. Down = less noise reduction, Up = more noise reduction.

Drag it till you hear no change in the low level desired audio.

You can also set up parameter modulation on the Wet/Dry knob, triggered by the audio, to increase the wet level when the audio gets quiet (wet level being the amount of noise reduction). It's a bit trickier to set up, but worth looking into.

----

Traffic rumble is tougher. A spectral edit might be one way to handle that.

[studer58]

Thanks guys....that's some very helpful info and direction to travel forward with...much appreciated !