A bare PCB for the MFOS Guitar Envelope Follower. The main idea of an envelope follower is to create a voltage that describes the envelope of the signal being fed in. It is essentially an amplitude detector. If you could watch the input signal on an oscilloscope you would see that there are peaks and valleys in the amplitude signature. If you drew a line along the top of the signal you would be imagining what the envelope follower voltage looks like. Now take this voltage and control a low pass filter with a nice amount of ring and put the original signal through that. The result is a great auto-wah sound with tons of character and responsiveness. If you want to exercise or cultivate your electronic skills, get your soldering iron out, and feel the accomplishment of making your own very cool instrument effect.
Supplied without instructions which are available on the MFOS website or components that are available from us at Soundtronics either individually or as a kit.