I am always and only surprised by a software for the acoustic correction of control rooms. The software in question is called ARC 2 by IK Multimedia; it comes supplied with a measurement microphone and a set of plugins that can be loaded into any DAW.
Obviously, it doesn't work miracles, and correction using sound-absorbing materials, bass traps, and diffusers is always the best approach, but considering the costs for physical acoustic treatment of a room, this software does its job very well.
In this video, its operation is shown:
https://www.youtube.com/watch?v=ci1U2uhFqL4
In this other video, a comparison of the room's frequency response with and without the plugin:
https://www.youtube.com/watch?v=WK-c-lTkl10
