---
title: "init(instrumentID:groupID:duration:extendedParams:)"
framework: audiotoolbox
role: symbol
role_heading: Initializer
path: "audiotoolbox/extendednoteonevent/init(instrumentid:groupid:duration:extendedparams:)"
---

# init(instrumentID:groupID:duration:extendedParams:)

## Declaration

```swift
init(instrumentID: MusicDeviceInstrumentID, groupID: MusicDeviceGroupID, duration: Float32, extendedParams: MusicDeviceNoteParams)
```