Zeppelin Design Labs VPM-1, Owner'S Manual

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parameters of how the signal is processed. First, we’ve incorporated five different tapers (or sweeps,
or response curves), including logarithmic, linear, and reverse logarithmic. Next, we’ve included a
“reverse” feature that allows you to reverse the treadle action. Finally, one of the most useful features of
this mod is the ability to program the pedal positions for minimum and maximum volume, which allows
you to set the active range of the pedal’s sweep.
The Gain knob adds up to 14 dB gain to your signal. The TUNER jack provides a buffered split signal
which you can route either to a tuner or to a second signal chain.
The VPM-1 comes standard in mono configuration, but stereo configuration is available with a small
add-on upgrade board. In the stereo configuration, the VPM-1 can operate as either a traditional
stereo volume pedal where both audio channels get louder and quieter together, or it can operate
as a “pan” pedal, where one audio channel gets louder as the other gets quieter. Pan mode enables
the user to pan between two different signals. Another add-on upgrade board gives the VPM-1 the
ability to be used as an expression pedal, with programmable settings to accommodate the different
expression jack wiring configurations found on a wide range of effects pedals.
Figure 1: VPM-1 Block Diagram