EarthQuaker Devices Arpanoid Polyphonic Pitch Arpeggiator Guitar Effects Pedal

Its weird but there's so much you can do just requires time and patience

Aside from the more famous Rainbow Machine, this is Earthquaker's weirdest pedal. It's a pitch arpeggiator capable of tracking chords. It takes whatever note you play into it and transforms it into an adjustable ascending or descending scale. That's right; you play a single 'C', and if you're in Mode 1, it will play a C major scale from -1 octave to the note you've played. If you're in Mode 6, it will play a C minor scale from the note you've played to one octave above. There are wet-dry controls, a rate knob for adjusting the speed through which the scale plays, a step knob for adjusting how many 'steps' of the scale are played, from 'one' to all of them, and a toggle switch for adjusting whether the scale plays up, down, or does a palindrome.

Now, this is all very well and it's totally amazing! The pitch tracking and the smoothness of the scale interpolations are very good indeed.

But...

Well, to be honest, this is a pedal for those of us who are really shit-hot at music theory. The sort of people who know which Phyrigian or Locrian mode goes with which diminished 19th or whatever. Most of us will want to play chords on our guitars, and things are pretty involved playing just one single note on this thing. Things get even more complex throwing in a fifth. Add a third and you'd better be pretty sure whether that's a minor or major third you've got there! And then...your song changes key...argghh....

So, I'm not saying this is a bad pedal. It isn't. It's extremely clever and it sounds good. But to get the most out of it, don't expect instant gratification. It's one for really just sitting down and experimenting with, and you might find that it only fits with one passage of one verse or whatever. It's similar to a frequency shifter in that respect; you could spend years trying to master this pedal!

One thing which could be better: I wish it had MIDI or CV inputs, or even just a tap tempo, so that you could lock the speed of the arp to a beat. So far, I've found that it gives a pleasing effect when the number of steps of the arp are low (say, 2), and the rate of stepping through fairly high. Used like this, the pedal can give you a really quirky and unusual sort of 'pitched tremolo' effect, especially when used with a delay to smear the pitch changes a bit. Also, when there's only one step, it becomes a good-quality octave pedal or simple pitch-shifter.

Andy from Pro Shop guitars makes it sound amazing in this video: https://www.youtube.com/watch?v=v-N_Ar3xfak

But he knows what he's doing, of course!