Trond
Been there, but that was many years ago.
Have you tried using the noise reduction modules as plugins?
- Split the channels into 2-channel pairs.
- For example in ProTools or Reaper or similar, insert two instances of
the noise reduction VST into two separate stereo tracks.
- Route and bounce/render into separate files.
In plugin mode I think you need to use realtime analysis for the noise,
which _just might_ cause differences between the channels.
You could also use modular synth software such as Blogue Bidule or
AudioMulch.
I quickly tried the routing in Reaper and Mulch and they seem to work.
I didn't check latencies or changes in phase.
- - -
When I actually did noise reduction to B-format recordings, I think I
processed
the files as two "stereo" files and had two go's. Must have used RX, Sonnox
or Voxengo noise reduction.
I took the noise analyze from one of the channels, most likely X.
First processed W and X.
When processing YZ, I copied the X analysis to YZ and used it. I don't
remember
getting any serious problems with the phase. At least the noise got lower.
I didn't use the Z in HOA.
The original problem was the high self noise of the AMS ST 250, which
really bugged me.
Eero
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