Isol8 is an advanced mix monitoring tool. It divides the frequency range into 5 bands.
These 5 bands can be soloed or muted individually. This will help you to concentrate on certain frequency ranges during the mixing and mastering process.
Isol8 is originally designed to be used on the master track, but it can also be used on individual audio track busses.
https://www.tb-software.com/TBProAudio/ISOL8.html
Features
5 adjustable frequency bands
Solo/mute function for each band individually
Linkwitz-Riley crossover filter design
24/48dB/Oct filter slope
Multiple filter channel modes (Stereo/Left/Right/Mid/Side)
Multiple monitor modes (Stereo/Left/Right/Mid/Side)
In-place or centered monitoring
Adjustable output level
Loudness dim function
Large and easy to use GUI
64-bit internal processing
free of charge