Source Audio Soundblox Pro Poly-Mod Filter - Manual (Page 17)

Synchronizing the LFO, Use with an Expression Pedal | 17
SYNCHRONIZING THE LFO
The LFO will start from zero in its pattern every time the pedal is
switched on or a new tempo has been set using tap tempo. This facili-
tates the synchronization of the
LFO to other musicians or recorded
tracks. Resynchronization will also happen when switching from one
preset to another.
USE WITH AN EXPRESSION PEDAL
A passive expression pedal can be connected via the Poly-Mod Pro’s
expression input. Use an expression pedal to control a variety of functions
that can be set in the Backpage mode (see Backpage Parameters section).
For example, use an expression pedal to manually modulate a filter effect
in the same fashion as a wah-wah pedal, control the
LFO speed of an ef-
fect, switch quickly between effect types, or control the depth and sweep
range of a chosen effect.