432108a5_poly__Reference__Description
[Name] target [Type] int [Description] 
Specifies the poly~ instance that will receive subsequent messages (other than messages specifically used by the poly~ object itself) arriving at the poly~ object's inlets - for example, The message target 2 routes messages to the second instance. The message target 0 sends input to all instances, and using any negative number value with the target message will disable input to all instances.
poly~ Reference