In order to listen to the effects, a short MATLAB script was written to load a clean guitar audio sample into the MATLAB workspace to be used by Simulink.
From there we could simulate the audio effects, save the resulting audio file, and listen to it.
load_audio.m
Distortion Circuit
Wah Circuit
Distortion Off
Distortion On
Input Buffer and Active Filter
Distortion
Power and Controls
Input Buffer and Active Filter