Amp Distortion

(5 pts) Implement the amplifier feedback, as described in ``Amplifier Distortion + Amplifier Feedback''. except that you can feedback the final output of the distortion unit for modularity. The controls are feedback gain and feedback delay. This can be simply implemented directly in the main test program mygtr.cpp. In the main program, the input to the amplifier feedback unit should be the output from the distortion unit. Its output is fed back into each string in ElecGuitar.