Trying to eliminate a buzz when I run audio from a laptop that is also connected to our projector (movies, slide shows, etc.). It's different than 60Hz hum that normally comes through ground loop issues, but I suspect the cause is similar. It goes away when the video cable is removed from the laptop. Is there a way to isolate he ground from the video line? The audio feed goes through a DI already, would an external sound card help?
Sorry if this has been covered elsewhere, I did search but couldn't find any best practices for this type of situation.
Sorry if this has been covered elsewhere, I did search but couldn't find any best practices for this type of situation.