Appreciate your response Joe, as far as a tool that does this similarly. Possibly serato software does this with their waveforms. Since what they display is one complete mixed waveform with differentiated colors. (similar to mini meters)
Here is what i found online:
In Serato DJ software,
the visual representation of a stereo signal on the waveform display doesn't explicitly display the left and right channels as two separate, distinct waveforms.
Instead, Serato DJ's waveforms provide a combined view, indicating the frequency content and overall amplitude of the audio signal.
So in other words, if mini meters had an option in the "waveform" area, to display the complete stereo signal/complete audio content of a track, thereby allowing us to see the overall frequency content and overall amplitude of the audio signal.
Maybe adding options of either a sum(+) of mid/side channel mode or even a sum(+) of left/right channels mode?
hopefully this can help, cheers.
Rmsuccess