So you are looking at audio frequency content in any one of many spectrum analyzers. Maybe you are looking to confirm what you hear, maybe to simply get an idea if the mix is as properly represented across the frequency spectrum as you are hearing/hoping etc... Forget about sounds good, is good for a moment as this is purley a technical observation about the tools and measuring with them. Below I'm playing pink noise through three analyzers (ReaEQ, Span, RME's DigiCheck). All use different default slopes...
RME DigiCheck: -3db/Oct to match the pink noise slope. Makes pink noise appear flat and possibly matches the way our ears hear frequencies closer:
Voxengo Span: -4.5dB/Oct which goes just beyond the pink noise 3dB slope:
ReaEQ: -0/dB Oct - Essentially linear, makes white noise appear flat and running pink noise display's the natural pink noise -3dB slope:
Obviously not being aware of the above can be confusing. I prefer to use the -3db slope but ReaEQ for example doesn't allow changing it best I can find... Chime in please, which do you use, if any and why.