The Event Manager extension in LabChart is a free add-on that can be used to monitor changes in incoming data and to carry out a single or combination of actions to alert the user to these changes, including adding a comment, playing a Macro or playing a sound.
Once the event manager is set-up and you find that the play sound option is not working, there are a few things to investigate:
1. Is the event actually occurring in the recording? - Check that the settings are correct for your event.
2. Are you using a master alarm setting where not all components of the alarm are met? - Check the Event Manager set-up.
3. Are the speakers on the computer muted? - Check the sound icon in the tool bar on your computer.
4. Is the Volume mixer muted for the LabChart Application? - Right click on the sound icon in the tool bar and choose 'Volume mixer'. Check that the volume for the LabChart application has not been muted or significantly reduced.