Since one of the missions of public address control systems is to manage the sending and amplification of pre-recorded messages, whether commercial, informative, or alarm, there are electronic devices that store the messages digitally (PCM, WMA, MP3, OGG, etc.) and, either manually or remotely from the alarm control panel, are responsible for transmitting them to the appropriate speaker area.

Managing pre-recorded messages is essential in evacuation and voice alarm systems.

