Electro-Harmonix Attack Decay Tape Reverse Simulator (VINTAGE) 80's 117 Volts (or 220 with adap.)
With the titular Attack and Decay times being individually adjustable, this
thing is capable of producing far more than simple "Reversed Tape" sounds. Think
of it for what it is: with the balance knob turned completely clockwise, this is
an AR envelope generator: Short attack and decay settings will give you a koto
sound; long attack, no decay for a bowed effect; no attack, long decay... well,
that's what's happening with your guitar when the pedal's off anyway, but you
get the idea. Toss in an selectable "Edge" distortion circuit (on the back of
the unit), and you've got yourself an interesting machine.
Sensitivity
Sets the sensitivity of the effect to the input signal.
Blend
Mixes dry signal with effected signal.
Attack
Sets the attack time.
Decay
Sets the decay time.
Harmonics
Adds harmonics to the signal.
Edge
Turns on/off a high gain distortion
https://www.youtube.com/watch?v=r-Nk253qsCg