also check your audio settings. many projectors have speakers inside and will take audio from a HDMI connection. if you are using HDMI, make sure that your system audio and sound effects audio are not routed to the HDMI connection....
As long as we’re going down that route, these are just the tip of the iceberg in steps to make sure that your computer is fully optimized for show use. My teammate Sam posted a guide to important things to tweak on your computer for best performance in QLab, which you can find at http://figure53.com/notes/2013-10-29-prepare-execute-troubleshoot/
Good luck!
-Andy
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Andy Lang
@SoundGuyAndy
sup...@figure53.com