---
title: "Duck Background Audio for Priority Announcements – nnounce"
slug: "ducker"
description: "The ducker lowers up to 8 channels when the priority input exceeds a threshold, for emergency calls."
updated: 2024-11-14T12:21:04Z
published: 2024-11-14T12:21:04Z
canonical: "docs.simpleway.cloud/ducker"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.simpleway.cloud/llms.txt
> Use this file to discover all available pages before exploring further.

# Ducker

> Ducker component is used to **automatically lower the volume of one or more audio channels when a "priority" channel's signal exceeds a defined threshold**. The priority channel is then mixed into the outputs, either replacing or playing louder than the attenuated channels .

The component allows you to adjust:

- The gain applied to the main channels
- The hold time for the reduced gain on the main channels
- The attack and release times for how quickly the gain is reduced and restored, ensuring smooth transitions
- The gain of the priority channel

The Ducker supports 1 to 8 audio inputs with one designated priority channel. You can either select a preset detection time or manually control it. The priority channel is the first input on the left side of the component.

A common use case is for emergency announcements, where all other channels are attenuated, and the announcement is prioritized.

![](https://cdn.document360.io/a3e67867-6316-451b-94ad-ec727ac9102a/Images/Documentation/image(96).png)

With the ***Add IO*** button you can insert additional input and output pins on the ducker component. With the ***Remove IO*** button they are deleted again.

Use mouse over to see the the signal pin explanation.

- P - Priority input signal,
- 1 - Primary input signal.

![](https://cdn.document360.io/a3e67867-6316-451b-94ad-ec727ac9102a/Images/Documentation/image-1723111687994.png)