---
title: MusicDeviceStartNoteProc
framework: audiotoolbox
role: symbol
role_heading: Type Alias
path: audiotoolbox/musicdevicestartnoteproc
---

# MusicDeviceStartNoteProc

## Declaration

```swift
typealias MusicDeviceStartNoteProc = (UnsafeMutableRawPointer, MusicDeviceInstrumentID, MusicDeviceGroupID, UnsafeMutablePointer<NoteInstanceID>, UInt32, UnsafePointer<MusicDeviceNoteParams>) -> OSStatus
```

## See Also

### Interacting with Music Devices

- [MusicDeviceMIDIEvent(_:_:_:_:_:)](audiotoolbox/musicdevicemidievent(_:_:_:_:_:).md)
- [MusicDeviceMIDIEventList(_:_:_:)](audiotoolbox/musicdevicemidieventlist(_:_:_:).md)
- [MusicDeviceStartNote(_:_:_:_:_:_:)](audiotoolbox/musicdevicestartnote(_:_:_:_:_:_:).md)
- [MusicDeviceStopNote(_:_:_:_:)](audiotoolbox/musicdevicestopnote(_:_:_:_:).md)
- [MusicDeviceSysEx(_:_:_:)](audiotoolbox/musicdevicesysex(_:_:_:).md)
- [MusicDeviceComponent](audiotoolbox/musicdevicecomponent.md)
- [MusicDeviceGroupID](audiotoolbox/musicdevicegroupid.md)
- [MusicDeviceInstrumentID](audiotoolbox/musicdeviceinstrumentid.md)
- [MusicDeviceMIDIEventProc](audiotoolbox/musicdevicemidieventproc.md)
- [MusicDeviceStopNoteProc](audiotoolbox/musicdevicestopnoteproc.md)
- [MusicDeviceSysExProc](audiotoolbox/musicdevicesysexproc.md)