# AVMIDIEventListBlock ``` typealias AVMIDIEventListBlock = (Int64, UInt8, UnsafePointer) -> OSStatus ``` ## Parameters `eventSampleTime` The time in samples at which the MIDI events are to occur. `cable` The virtual cable number associated with this MIDI data. `eventList` One full MIDI, partial MIDI SysEx, or a full SysEx UMP message. ## Discussion \abstract A block used by an audio unit to send or receive MIDIEventList data. --- Copyright © 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)