<!--
{
  "documentType" : "article",
  "framework" : "CoreMIDI",
  "identifier" : "/documentation/CoreMIDI/core-midi-constants",
  "metadataVersion" : "0.1.0",
  "role" : "collectionGroup",
  "title" : "Core MIDI Constants"
}
-->

# Core MIDI Constants

## Topics

### Constants

[`var kMIDI1UPMaxSysexSize: UInt8`](/documentation/CoreMIDI/kMIDI1UPMaxSysexSize)

[`var kMIDIDeviceIDFunctionBlock: MIDICIDeviceID`](/documentation/CoreMIDI/kMIDIDeviceIDFunctionBlock)

[`var kMIDIDeviceIDUMPGroup: MIDICIDeviceID`](/documentation/CoreMIDI/kMIDIDeviceIDUMPGroup)

[`let kMIDIPropertyAssociatedEndpoint: CFString`](/documentation/CoreMIDI/kMIDIPropertyAssociatedEndpoint)

[`let kMIDIPropertyUMPActiveGroupBitmap: CFString`](/documentation/CoreMIDI/kMIDIPropertyUMPActiveGroupBitmap)

[`let kMIDIPropertyUMPCanTransmitGroupless: CFString`](/documentation/CoreMIDI/kMIDIPropertyUMPCanTransmitGroupless)

[`var kMIDIUInteger14Max: MIDIUInteger14`](/documentation/CoreMIDI/kMIDIUInteger14Max)

[`var kMIDIUInteger28Max: MIDIUInteger28`](/documentation/CoreMIDI/kMIDIUInteger28Max)

[`var kMIDIUInteger2Max: MIDIUInteger2`](/documentation/CoreMIDI/kMIDIUInteger2Max)

[`var kMIDIUInteger4Max: MIDIUInteger4`](/documentation/CoreMIDI/kMIDIUInteger4Max)

[`var kMIDIUInteger7Max: MIDIUInteger7`](/documentation/CoreMIDI/kMIDIUInteger7Max)


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)