A:Answer Audio out is 3.5mm, correct. The audio source is through Display Port or HDMI I believe, so you should be able to hook a stereo up to the 3.5mm with the correct cable. If possible, however, I would recommend plugging the stereo directly into the computer/console you're playing your games on. The 3.5mm plug on the monitor is more of a convenience for desk speakers or headphones, so it might not have the best quality audio.