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Vahlbruch "OptoTrem" Tremolo Pedal
The "OptoTrem" is an analog, hand-build, highly versatile tremolo effect pedal and one of the
finest studio quality tremolos in existence. "Opto-Trem" offers you authentic sine-wave 60`s
vintage tremolo sounds as well as modern square wave helicopter chop effects. Its unique
circuit is carefully designed around a photocell and it shows super low electronic backgroundnoise.
For an especially deep and homogenous modulation curve only handselected photocells
are used for the "OptoTrem" and each pedal is hand-trimmed to this specific opto-cell. The
"Speed" and "Intensity" knobs control modulation rate and depth, a toggle switch allows to
select either a "hard" or "soft" modulation curve. The pedal output level can be adjusted using
the "Volume" control. A constantly fashing amber LED indicates your adjusted modulation
speed and depth, even when the pedal is in bypass to easily match the song tempo.
Inside the button a magnet is integrated which position is measured by a sensor on the circuit board. If the button is now moved, e.g. if it is pressed downwards, the position of the magnet will also change. The sensor measures this change without any mechanical contact to the button and the information is send via a micro-controller to a gold-plated relay, which then does the actual audio signal switching.The advantages of "MagTraB" footswitches:
To change the state:
Step 1: Unplug the power supply cable.
Step 2: Hold down on/off "MagTraB" button.
Step 3: Plug in again the power supply cable.
Step 4: Release on/off "MagTraB"" button.
DONE! The next time your pedal powers up it will automatically start in the other state.