From a mixing point of view I mono my bass instruments, as well as keeping my kick mono. Sometimes I create stereowidth in the high end of a kick, but not often.
When using reverb, I nowadays split the signal where mono sounds (mid) and stereo sounds (side) have different room sizes and release times (tighter reverb on the mid signal, loose reverb on the side signal). This allows for more airy, spacey reverberation on the stereo field, typically in the higher frequencies, and keeps the mono mix clean and tight.
If I'm mixing for film, dialogue is typically mono and kept centered. This helps keep it clear.
Typically I would do the same with vocals on a track, before adding effects like chorus etc. to taste.
Thanks. The math only defines how to calculate mid and sides signals from left and right ones. You only need one panorama to calculate the sides signal (L-R) instead of two and a merger. Also, you don't get a correct stereo pair by simply adding mid and side signals together.
I used your concept, but I couldn't wrap my head around the need for the maths, or all of your tools; I believe this accomplishes the same task. Thoughts?
Depends how how you like it. Sometimes i put reverb on a synth and then i turn it mono to give a cool sound effect. Usually though you would use mono if you wanted something to be in front of you, and stereo for behind. Just like panning sounds left and right
Mono files are mostly good for space saving on hardware samplers. For example if you just want an efficient kick loop, or acid sequence.