Audio through thunderbolt to HMDI not working?

[kannesss]

So i got a cord, that does thunderbolt to HMDI, and it looks perfect. Everything works well, except the audio comes out of the computer still...
Do I need to change a setting on the computer? Shouldn't the audio just automatically go through though?

 

[GGJstudios]

System Preferences > Sound > Output > HDMI

 

[rgr555]

yea change the audio output

 

[kannesss]

System Preferences > Sound > Output > HDMI

oh... im stupid. forgot to include that lol

Thanks for the help