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# kAUNodeInteraction_Connection

The different types of node interactions.

## Discussion

The term interaction is used as a general term to describe some interaction of a node. Currently, the interactions of a node that the graph manages are described below.

## Topics

### Constants

[`var kAUNodeInteraction_Connection: UInt32`](/documentation/AudioToolbox/kAUNodeInteraction_Connection)

connections between 2 audio units,

[`var kAUNodeInteraction_InputCallback: UInt32`](/documentation/AudioToolbox/kAUNodeInteraction_InputCallback)

input callbacks being registered to a single audio unit’s input bus.


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