I need to do basic editing of wave files: trim, fade, amplify, normalize, but with the ability do do these for each channel separately. Unfortunately Audacity does not seem to satisfy that last requirement, or I cannot find out how to make a selection in one channel only. (E.g. I have a stereo recording of a press conference, with the right channel very weak, and I need to be able to amplify channel R more than channel L).
Someone who works in a recording studio recommended Reaper, which is billed as a "audio recording and editing" software, but it seems to only do the former. After I figured out how to select a part of a track with the mouse (dragging doesn't) I realized it has no commands to fade in, fade out, amplify etc. It seems to be a powerful multitrack recorder, but I can't find a single editing feature except maybe Cut

I checked Cool Edit Pro, found out it became Adobe Audition and sells for 422 Euro plus VAT, ok, next.
So what else is there? Doesn't have to be free; I was fully prepared to pay the $60 for Reaper, if it did the things I need.