If you want a flurry of octave combinations at an incredible price, check out the Mooer Pure Octave pedal. This teeny tiny pedal has a huge gift to give: 11 distinct octave modes, each with differing above and below combinations, like above two and above one, below two and above one, and tons more. And with controls for both the sub-octaves and upper octaves you throw into your sound, you get total control over your octave sounds in one great little pedal.