Inspired by Rainbow Machine. Are you brave enough to jump into the rabbit hole to see how far your sound can go with this polyphonic harmonizing modulation machine?
If you are the type of person who loves to experiment with your waves, you need to have this board. The Rainbow Device will definitively get you further away from the typical guitar sound and expand your possibilities beyond the known.
Once your signal travels to this board, it will put a new twist on your playing by adding polyphonic harmonies, real-time pitch shifting with wild launches and descends, pandemonium chorusing, and a large etcetera of transformations before your very ears.
Requires a Spin FV-1, meaning SMD soldering of an expensive 28 pin IC. So, we would not recommend this project for beginners. A lot of Flux and taking the time you need helps to get this done. There are also tutorials online that will help you manage this. For the expression pedal, you need a switchable jack, or you will have problems with the signal not passing through.
But this pedal worth every drop of sweat. We still remember when we tried this polyphonic pitch shifting harmonizer for the first time. Hours passed without us noticing the time flying. And while we were having fun, we invoked some alien sang, psychedelic rainbows, pixie dust, and swelling chorus. Who knows what you will summon with this incredible board?
For further analysis on this circuit take a look at this thread on Free Stomp Boxes Forum.