Search Knowledge Base: What’s the difference between HDMI and VGA in the classroom? In most classrooms, instructors have the option to use either HDMI or VGA. So, which should you use? OIT recommends you connect to HDMI in your classroom, if possible. When you have chosen how you will connect, choose the option for either HDMI or VGA on your AMX panel. Note: VGA is listed as laptop in some classrooms on the AMX panel. HDMI may be listed as HDMI 1 or HDMI 2, if multiple HDMI cables are available. The top cable will be HDMI 1. What's the difference between HDMI and VGA? HDMI is a newer technology. It is digital. Sound and Video travel over the same cable. The quality of the video is higher. This is the current industry standard for monitors, projectors, televisions, etc. VGA is an older technology. It is analog. When using VGA, if you want to play sound, you need to plug in the attached audio cable into your headphone jack in order for the sound to play. For information on the ports you may have on your laptop, including USB-C, Thunderbolt, and Mini DisplayPort, please see our article on what adapter you may need for your classroom. Need more help?