Hi

I would like to know where do i put limit between LO-MIDI-HI tones.

LO to 100 Hz, MIDI from 100 Hz to 4 KHz and than HI tones
from 4 KHz forward?

I would like to know the line between them in a three band Multicompressor?

Thanks

Having a look at the defaults on a T-Racks Multiband Limiter, they
Split Low/Mid at 210Hz | and Mid/High at 7.8 Khz

That usually works for just fine for me.

Hope that helps,