1. A music effects processor, comprising: one or more digital signal processors; an audio input to the music effects processor configured to receive a time domain audio signals; an analog to digital converter coupled to the audio input that is configured to convert the time domain audio signal into a time domain digital audio signal that is input to the one or more digital signal processors; where the one or more digital signal processors are configured to: process the time domain digital audio signal to isolate a fundamental frequency component of a frequency domain representation of the digital audio signal, generate a modified frequency spectrum representation having a modified fundamental frequency equal to the fundamental frequency component, convert the modified frequency spectrum representation to a modified time domain digital audio signal; and a digital to analog converter that is configured to convert the modified time domain digital audio signal to an analog output signal.