Compressor Plugin settings not same going from track to Buss?

[Chris KerbWerx]

Ive never noticed before, but placed a compressor direct on a vocal track for an uneven verse sung. As there were separate tracks for verses, chorus, etc I decided I just would move it to Vocal Buss...then the compressor didn't act the same unless you increase settings. I had it set on Vocal at -5.0db Thresh hold had to increase that to -9.0  or more to get close to the same on buss. Still never had the exact character to me.  Is this normal? This happened with another compressor also so I'm assuming it's  non consistency in tracks and busses?

[OutrageProductions]

That (in my science of acoustics) is what happens when multiple signals are convolved (summing) and (maths) functions cannot be expected to operate in a similar manner on a single source versus summed sources. Nature of the beast. Get used to dealing with the physics of sound.

In a compressor for example, the activation threshold level and attack & release slew rates will operate differently on a solo track versus summed track(s).

Edited August 23 by OutrageProductions

[Chris KerbWerx]

Thank You.