# 2 Sound in browsers

#### Overview

For the sounds to be played in Zabbix frontend, *Frontend messaging*
must be enabled in the user profile *Messaging* tab, with all trigger
severities checked, and sounds should also be enabled in the global
notification pop-up window.

If for some reasons audio cannot be played on the device, the
![](../../../../assets/en/manual/config/mute_icon.png) button in the
global notification popup window will permanently remain in the "mute"
state and the message "Cannot support notification audio for this
device." will be displayed upon hovering over the
![](../../../../assets/en/manual/config/mute_icon.png) button.

Default audio clips are in MP3 format.

Note that since 4.4.4 sounds are supported in MP3 format only.

The sounds of Zabbix frontend have been successfully tested in recent
Firefox/Opera browsers on Linux and Chrome, Firefox, Internet Explorer,
Opera and Safari browsers on Windows.

::: noteimportant
The auto play of sounds may be disabled in recent
browser versions by default. In this case, you need to change this
setting manually.
:::