Release your inner beast with the first realistic guitar feedback simulator on the market. Go from moderate and subtle to rampant and wild by the twist of a knob (or two). To break new musical ground, try inputting a synthesizer, a violin, or even your mother's grand piano. Acoustic Feedback Deluxe Plug-in also features a Harmonic Selector, that allows you to select which harmonic you would like to feedback on. It also features a sub-harmonic with which you can get a really dirty sound. The Acoustic Feedback Deluxe simple user interface. Control amount of feedback with the Feedback knob, and the sensitivity with a Tolerance knob. NOTE: This software requires a Pace iLok USB key ("dongle") which can hold over 500 cross-platform software authorizations — all manageable via iLok's website. You can authorize software programs, plug-ins, features, and modules — even those published by multiple developers — without the burden of multiple keys. iLok also allows you to easily transfer authorizations from one computer to another without violating a software publisher's license agreement. Purchased separately; see product number 241800.