How would guitar distortion affect this. Probably not intuitively
Distorted guitar music can be dynamic or compressed. A lot of that is a function of what is generating the distortion.
Over-riding the input of the amp (either "hot" pickups or a booster or compression pedal)
Pre amp distortion
Power amp distortion (even the rectifier type comes into play, so we could say portions of the power amp)
Speaker distortion
Can you tell I play guitar
As a for instance, you could play the same guitar into different amps of the same apparent distortion into the same speaker cabinets have have a pretty good difference in compression.
Say a Marshall JTM 45 versus a Soladano SLO
I will see about graphing the Jeff Beck tune I was thinking of (CWEAL)