What if the monitor I bought doesn't have an HDMI interface?

Hd AV color difference line, VGA line, HDMI line, if displayed on HD HDTV.

There is little difference between the two, especially VGA cable and hdMI cable, because VGA cable is actually HD cable.

Since your monitor does not have an HDMI interface, it is not necessary to connect the monitor to the adapter in order to use an HDMI cable. Even if you succeed, I regret to tell you that there is no sound in the speaker of your monitor, because your monitor is not an HDMI interface, and audio and video are not connected on the same line. It must also be connected with a red and white or earphone interface.

So there is no need to blindly choose HDMI interface.

My monitor has a built-in stereo system. Do I need extra stereo and audio cables?

I suggest you equip yourself like this and complete your highest game level.

If you want good sound quality, you must connect an active speaker. To tell the truth, the built-in sound provided by the monitor is very poor.

You can buy an XBOX360 VGA cable first (if money is tight, you can consider buying a high imitation, the price is around 80 yuan, and if it is original, it is between 150-230).

Plug it into the monitor and plug the other two wires (red and white) into the active speaker. In this way, playing games will be very exciting.

If you consider not buying a speaker, you can plug the audio cable directly into the monitor. If the interface is wrong, just buy a conversion interface. The price is around 5 yuan.