An octave pedal, as the name implies, is a circuit that’s meant to increase or decrease an audio source by a full octave. Unfortunately, these circuits are also often incredibly complicated.
However, I’ve had an idea for an octave-up schematic for some time now, and I just recently got the chance to test it out!
Here’s an explanation of how the circuit works:
After this, the waveforms are mixed together, and we can see we finally have 440 Hz, twice the Hertz value of our input- in other words, a full octave! This works due to the way that waveforms work- When the negative peaks are set to positive values, the amount of pulses (the frequency) is effectively doubled.