# MIDIPacket.ByteCollection ``` struct ByteCollection ``` ## Topics ### Initializers [`init(UnsafePointer)`](/documentation/CoreMIDI/MIDIPacket/ByteCollection/init(_:)-5j13x) [`init?(UnsafePointer?)`](/documentation/CoreMIDI/MIDIPacket/ByteCollection/init(_:)-8ul4l) ### Instance Properties [`var count: Int`](/documentation/CoreMIDI/MIDIPacket/ByteCollection/count) [`var endIndex: Int`](/documentation/CoreMIDI/MIDIPacket/ByteCollection/endIndex) [`var startIndex: Int`](/documentation/CoreMIDI/MIDIPacket/ByteCollection/startIndex) ### Subscripts [`subscript(MIDIPacket.ByteCollection.Index) -> MIDIPacket.ByteCollection.Element`](/documentation/CoreMIDI/MIDIPacket/ByteCollection/subscript(_:)) ## Relationships ### Conforms To [`Collection`](/documentation/Swift/Collection) [`Sequence`](/documentation/Swift/Sequence) [`BidirectionalCollection`](/documentation/Swift/BidirectionalCollection) [`RandomAccessCollection`](/documentation/Swift/RandomAccessCollection) --- 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)