Third hand

My Digitech RP350 (“Modeling Guitar Processor”) has the ability to control almost any parameter with its expression pedal. Some of the things I’ve had fun playing with have been...

• Reverb depth
• Tremolo speed
• Amp gain
• The mix between the original signal and the harmony generated by the intelligent pitch shifter.

When I do this, though, I always wonder how might do it with individual pedals. Well, I chanced across a device that claims to do exactly that: the Third Hand by Tone in Progress. An expression pedal that appears to be able to mechanically turn a knob on an effects pedal.