External monitor on HDMI but no sound This has been asked again but none of the answers apply because I've tried them all:


My MacBook is a 2013 Retina Macbook Pro, so it supports audio through HDMI
the HDMI cable is plugged directly into the HDMI port (no adapter)
the monitor has speakers, and their volume is to 100% (Asus PA248Q)
I've selected the HDMI audio output in the system settings
I've tried with a different HDMI cable


But still no audio through the monitor's speakers. What am I missing?

FYI, the audio works fine in any other case.
From what I can tell from reading the Specifications Page, there are no speakers built into  this particular monitor.  There are however, two different audio outputs:  HDMI 1.3 and 3.5mm headphone/speaker jack



The easiest way to test this out is just get a cheap set of speakers or a headset with the 3.5mm jack and plug them in.  If it works, you know all is well with your setup - you just need speakers.