In FMOD Ex the API included volume and pan. These are missing in FMOD Studio Low Level. Setting volume was convenient because it allowed me to adjust sample volumes without editing the actual sound file. Is there another way to do this conveniently?
Volume and pan were removed because they weren’t really needed or inherited from the sound file itself. Default frequency makes sense because each sound file has its own built in default frequency.
You would just call setVolume on your channels, the low level is trying to avoid extra functions that wrap the functionality of functions that already exist in the API. If a more data driven approach is needed it is a good idea to look at using FMOD Studio instead.