---
title: Monitor
framework: coremidi
role: symbol
role_heading: Instance Property
path: coremidi/mididriverinterface/monitor
---

# Monitor

Enables monitoring of MIDI packet lists by the specified driver.

## Declaration

```swift
var Monitor: (MIDIDriverRef, MIDIEndpointRef, UnsafePointer<MIDIPacketList>) -> OSStatus
```

## See Also

### Properties

- [FindDevices](coremidi/mididriverinterface/finddevices.md)
- [Start](coremidi/mididriverinterface/start.md)
- [Stop](coremidi/mididriverinterface/stop.md)
- [Configure](coremidi/mididriverinterface/configure.md)
- [Send](coremidi/mididriverinterface/send.md)
- [EnableSource](coremidi/mididriverinterface/enablesource.md)
- [Flush](coremidi/mididriverinterface/flush.md)
- [MonitorEvents](coremidi/mididriverinterface/monitorevents.md)
- [SendPackets](coremidi/mididriverinterface/sendpackets.md)
- [AddRef](coremidi/mididriverinterface/addref.md)
- [QueryInterface](coremidi/mididriverinterface/queryinterface.md)
- [Release](coremidi/mididriverinterface/release.md)