Settings - Stereo Tool

Mastering Stereo Tool Settings: The Ultimate Audio Optimization Guide

The multiband section splits your audio into different frequency bands so loud bass notes do not cause your vocals to quiet down. stereo tool settings

This is where Stereo Tool separates amateurs from pros. Instead of compressing the whole song (which causes "pumping"), it splits audio into 4 or 5 frequency bands. clean factory preset.

Begin with the "Bypass" or a very basic, clean factory preset. stereo tool settings