Overdrive

(5 pts) Write an STK class Overdrive.cpp which simulates a nonlinear soft-clip amplifier distortion, as described in ``Amplifier Distortion + Amplifier Feedback''. The controls should be (at least) pre-distortion gain, post-distortion gain, and direct-signal gain. Its tick method takes an input and emits an output. In the main program, the input to the distortion unit should be the sum of all strings' outputs.