Soundtoys PanMan - Manual (Page 23)

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PingPong Mode
Ping-Pong mode allows you to alternate between pan positions on every
trigger. The Offset and Width controls default so that the two positions are
hard right and hard left, but you can adjust these so that PanMan bounces
back and forth between any two positions.
Random Step
Random Step mode allows you to pan to a new, random position on every
trigger. This is just like Random Mode, but trigger based instead of rhythm
based.