# MIDIReceived(_:_:) Distributes incoming MIDI from a source to the client input ports which are connected to that source. ``` func MIDIReceived(_ src: MIDIEndpointRef, _ pktlist: UnsafePointer) -> OSStatus ``` ## Parameters `src` The source which is transmitting MIDI. `pktlist` The MIDI events to be transmitted. ## Return Value An OSStatus result code. ## Discussion Drivers should call this function when receiving MIDI from a source. Clients which have created virtual sources, using MIDISourceCreate, should call this function when the source is generating MIDI. Unlike MIDISend(), a timestamp of 0 is not equivalent to “now”; the driver or virtual source is responsible for putting proper timestamps in the packets. --- 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)