Is it possible to schedule my laptop to mute and unmute based on calendar events? I would like my mac (OSX 10.9) to automatically mute during meetings.  I have a fully abstracted calendar, with several sub calendars. 

Any apps?
Any Automator tricks?
Open Automator app

Click on Calender and find and Drag the Find Calender Events

Select the Event has attendees! (obviously :) !

On left select the Utilities and find drag the set computer volume to the right.

Run a test in Automator to verify the Mute is activated, and save the file.