Foxrox Octron is worth looking at. Analog signal path and tracks extremely well.
What's great is each part of the signal can be switched....ie, Octave up has it's own switch, the dry signal has it's own switch, and the octave down has it's own switch. Each has its own level too. The 4 adds a sub Octave as well.
Really awesome and straightforward pedal and design. I've been using the 2 since it was released and added the 4 which is a 2 on steroids.
Killer pedals.
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