Alesis ModFx Ampliton Notice D’Utilisation Abrégée

The up/down rocker switch beside the Autopan label on the right
side of the unit selects the type of autopan effect. The LEDs next
to the switch light up to indicate the current mode. There are  five
kinds or shapes of Autopan available.  Four of these are similar to
the Tremolo modes, except of course they modulate the stereo pan
position instead of the amplitude of the signals.

This mode selects a triangle wave  for the autopan effect.  In
Triangle mode, the sound pans smoothly  from side to side at
whatever rate you select.

             

This mode selects a square wave  for the autopan effect so the
position of each signal jumps more sharply  from side to side, and
holds its position until it’s time to jump again.  If the [DEPTH]
knob is turned all the way up, the sound will jump completely
from side to side once each cycle.

            

The triggered mode selects a triangle wave  for the autopan effect
that starts out  fast when a trigger occurs, then slows down.  A
trigger is any sudden increase in the input audio level.  So, if you
play a heavy accent on a note, the signals will  flutter  from side to
side quickly, then slow down.  Pressing the [RESET MOD] button
will also cause a trigger.