Effects range from compression with tone sculpting, to nasty growling distortions. Also included are some oddball robotic ringing effects, rounding out this sonic arsenal.
Tube FM 4 is a good choice if you like unique saturation/tone tools that can go from subtle to total sonic destruction. Of course they have the same kind of vintage sound as my other tube radio libraries, even while providing the more extreme results. If you like to experiment with sound I’m sure you could find countless uses for these, and each effect can give a wide range of results depending on how you adjust them. These have a lot of controls to adjust and each one changes the sound in some way, some more or less predictably than others, providing lots of area for experimentation and lots of things to discover.