Viz Mosart Administrator Guide

Version 5.1 | Published January 19, 2023 ©

Audio Players

A Viz Mosart user can play out audio files using an audio player. This is useful, for example for playing regularly used audio, like openers and audio-beds.

A basic audio player is always included as standard in a Viz Mosart. You can also install third party audio drivers (for example SpotOn) as standard player, as described below.

  • User actions are presented in the Viz Mosart User guide in section Playing Audio.


Setting Up an Audio Player

Default Viz Mosart Audio Player

Supported File Formats

The standard Viz Mosart audio player supports formats: mp3, wav, wma, aac, m4a, mp4, aiff, avi.

Setting up the default Viz Mosart audio player

  1. On the machine that will be used for the audio player, open the Viz Mosart installation folder and locate the Audio Player installer file, named something like

  2. Install Audio Player, then start it.

  3. On the Viz Mosart server, open AV Automation.

  4. Go to Devices > Preferences > Audio > Sound player.

  5. Check Use sound player and choose from the players in the drop-down list.

  6. Under Host write the IP address to the computer where audio player is running.

  7. Under Default directory, write the folder path where the audio files are stored.

  8. Restart AV Automation and check that the connection is green.


Third Party Audio Player Devices

Setting up a third party audio player device

You can connect a compatible third party audio player.

This sample procedure prepares a SpotOn audio player.

  1. Download, install and start the device software to a host machine available to the Viz Mosart server.

  2. In AV Automation, go to Devices > Preferences > Audio > Sound player.

  3. Check Use sound player and choose SpotOn Audio Player from the players in the drop-down list.

  4. Under Host write the IP address to the machine where the SpotOn player is running.

  5. Restart AV Automation and check that the connection is green.


Working with Audio Players

Working with the Viz Mosart Audio Player

When the default Viz Mosart Audio Player is configured, the user opens the UI from a desktop shortcut images/download/thumbnails/95400082/mpIcon.png
or file location C:\Program Files (x86)\Mosart Medialab\Mosart Audio Player\Mosart Audio Player.exe.

Note: User actions are described in section Playing Audio of the Viz Mosart User Guide.

Viz Mosart Audio Player UI


UI Element


Settings button

Open the Settings window for configuring the Audio Player. See Audio Player Settings below

Audio Directory

Folder path to where your audio files are. All files in this folder are ready to be played
(This location is set in AV Automation Devices > Properties > Audio > Sound Player)

Numbered Output list
(left hand panel)

A list of all available devices. The first number is the number you use in AV Automation or the NRCS to specify the audio file playout.

Log panel (right hand panel)

All log messages that the audio player creates.

AVAutomation status

Green: AV Automation is connected
Red: No AV Automation connection.

IP Address

IP address of the computer Audio Player is running on.


Version number of the Audio Player.

Audio Player Settings

  • Click the menu bar Settings to open the settings dialog.


Testing panel

Opens a panel for testing the functionality of the selected Audio Player.

File already playing behavior

Controls what the Audio Player does if a new file is played when a file is already playing.


The list on the left shows all the outputs, and the list on the right shows available playback devices on the computer. The line between them shows playback device mapping.

  • Click an output to map to playback device.

  • Click New to add an output.

  • You can rename or delete an output.

Audio Player Configuration File

The Audio Player Configuration file Mosart Audio Player.exe.config is at

%ProgramFiles(x86)%\Mosart Medialab\Mosart Audio Player\.

  • Change the baseAddress attribute to use another port:

<add baseAddress="http://localhost:8084/LiveSoundService.svc/"/>

Working with a Third Party Audio Player

This example explains the SpotOn audio player.

SpotOn Audio Player

Addressing an audio file that is stored in a SpotOn client is similar to the default player method above, but the file identifier is different.

  • LEVEL: This value does not affect the audio fader that is taken to Program. Instead a special command option is offered. Set LEVEL to -90 to send a STOP (playing audio) command. All other values are ignored.

  • OUTPUT: Enter the panel button number to identify the associated sound file (in this example "2a").


    Use the button number (mapped to OUTPUT) as reference (instead of the audio file name). You can then replace the audio file assigned to a button (for example, when a show is rebranded and new music selected) and still keep the same template information.
    This avoids having to change the file name.

  • AUDIO FILE: Enter the panel button name here (in this example 0452_32Bit).



  • Newsroom tag available. If a newsroom tag is added, and a value is provided by the NRCS, that value for the file name (with either AUDIO FIE or OUTPUT) is used.

  • When both panel button number and panel button name. are used as file identifier, the value of panel button number takes precedence.

See also

  • Audio in AV Automation Devices

  • Playing Audio in the Viz Mosart User guide (user actions).