that's what HDMI is for.
there are 4 main video outpputs
Mini display port
VGA - but people consider it to be outdated
DVI - mostly preferred by gamers or people who dont like monitor audio
HDMI - only difference between HDMI is that it can carry audio along with video.
if your monitor has speakers it is almost bound to have HDMI
so if something has HDMI it MUST carry audio otherwise HDMI is useless.
and if a GPU has HDMI it can carry audio too.