# OTS Signs Command Center Documentation
OTS Signs Command Center is an open source digital signage solution. It supports all main media types and can be interfaced to other sources of data using CSV, Databases or RSS.
Keywords: digital signage, signage, narrow-casting, ots-signs, open source, agpl, documentation

# Audio

Add Audio files to play on your Layouts and Playlists from the Library Search.

## Overview

- Upload new audio files directly to Playlists/Layouts from the Library Search.
- Files uploaded directly to Playlists and Layouts are automatically saved to the Library for re-use.
- Audio files can be also be uploaded in advance to the Library.

> We recommend mp3.wav file format.

- Set start and end times for audio files uploaded directly to a Playlist.
- Save audio files to Folders on upload, to easily control access to Users.
- Uploaded audio files are cached for off-line playback.
- Fully compatible with Overlay Layouts.
- Control the duration of the audio file.

  - Set a lower duration to cut the original file short.

  - Set a higher duration and use the Loop function to “loop” back to the beginning to satisfy a longer duration.

- Attach Audio files to other Widgets.

Audio can also be attached to other Widgets using the Context Menu.

> When attaching to Widgets, Users can enter a Volume as well as a Loop parameter to determine whether the audio will loop for the duration of the attached Widget or just play through once. Audio will stop once the parent Widget finishes playing!