this simulates input transformer style saturation and it does a good job. For once all the resets sound amazing. If you just want to get some phoney transformer lows and grime on a virtual instrument but you don't need all the features of like a waves hardware emulation just use this guy! Super low CPU hit and a great sound that's very analog. If I don't need EQ or compression this is my jam for thickening up something like Sytrus.