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# MIDIEntityGetSource(_:_:)

Returns one of an entity’s sources.

```
func MIDIEntityGetSource(_ entity: MIDIEntityRef, _ sourceIndex0: Int) -> MIDIEndpointRef
```

## Parameters

`entity`

The entity to query.

`sourceIndex0`

The source index.

## Return Value

A reference to a source, or `NULL` if an error occurred.

## Discussion

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