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# discover(handler:)

Discovers the available MIDI-CI nodes.

```
func discover(handler completedHandler: @escaping MIDICIDiscoveryResponseBlock)
```

## Parameters

`completedHandler`

A closure the system calls when a MIDI-CI node discovery request is complete.

## Topics

### Handling Callbacks

[`MIDICIDiscoveryResponseBlock`](/documentation/CoreMIDI/MIDICIDiscoveryResponseBlock)

A block the system calls when a MIDI-CI node discovery request completes.

[`MIDICIDiscoveredNode`](/documentation/CoreMIDI/MIDICIDiscoveredNode)

A discovered MIDI-CI node that represents a MIDI source and destination that respond to capability inquiries.


---

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