Possible to achieve good basic chroma noise reduction with a preset?

Yes, this is the stuff I set up:

grafik

If you want more control, these wavelet manual settings seem to work well:

grafik

There seems to be a very little purple color cast in the darks under the sofa that you can eliminate with the manual settings. You will need to adjust these settings individually for each ISO sensitivity.

I use dev/nightly builds, so if you have 4.0.1 stable, the xmp might not open correctly for you.

210210_211035.orf.xmp (10.0 KB)