Here is a nice video showing how to improve the punch and pressure of your
recordings with Isola Pro FX 2.1 from Lakeside Audio, a VST plugin for real
time audio source separation.

You can use it for retuning the volume of different instruments and vocals
and even drums in your recordings in real time - it is the only plugin
available at the moment on the market which can do this standalone, on the fly
and without any preprocessing or cloud Service.