the sm houses two soda meiser circuits with noise and chaos modes available for both. the sm can have a growly rhythm kind of sound, and turn all the way up to wretching silicon octave fuzz in high intensity
the joystick adjusts the intensity of both fuzzes by increasing your input volume as the stick approaches the corresponding volume pot. the joystick also effects the racket made by the noise and chaos
with the synth mangler you can essentially set up two tones and fire back and forth between them via the footswitches.
to witness the manglers ripping up a drum machine, check this very sexy vid.
to watch this beast on guitar check this video out, and turn it way up, just for me.