---
title: kAUVoiceIOProperty_DuckNonVoiceAudio
framework: audiotoolbox
role: symbol
role_heading: Global Variable
path: audiotoolbox/kauvoiceioproperty_ducknonvoiceaudio
---

# kAUVoiceIOProperty_DuckNonVoiceAudio

## Declaration

```swift
var kAUVoiceIOProperty_DuckNonVoiceAudio: AudioUnitPropertyID { get }
```