This article relates to the Cisco TelePresence System Codec C90, Cisco TelePresence System Codec C60 and Cisco TelePresence System Codec C40 products.
Q. I cannot get any audio from the TANDBERG Codec when it is connected to my monitor using HDMI, why?
A. This answer is valid for the following products:
TANDBERG Codec C20
TANDBERG Codec C40
TANDBERG Codec C60
TANDBERG Codec C90
Check whether the video output resolution for HDMI 1 is set to 800*600 or 1900*1200. Due to an issue with these two resolutions we are running them in DVI mode (DVI over HDMI), and the DVI mode does not support audio. To check or change the video output resolution, open the Home menu and go to Settings > Administrator settings > Advanced configuration > Video > Output > HDMI 1 > Resolution.
To fix this you can:
Select another video output resolution for HDMI 1
or, use the audio from Audio Line Out 1 and 2.