This mod is a mod for CustomOST, which allows you to add your own tracks to the game.
To get CustomOST, head here

This mod adds these soundtracks as the Control, Buildup, and Assault sections respectively:

Zardonic - Hallway Beta
Zardonic - Scouring the System
Zardonic - SUPERHOT (Hyperhot Mix)

start_control and start_buildup have been left unchanged in the first zip file, however they are boosted by 8 dB in the 2nd zip file. If you would like the original files to mess around with and change to your own personal tastes, please download the first zip file.