sdi to hdmi, how many channels embed ?

Hi

anybody knows how many channels of audio can be embedded into the hdmi signal that comes out of a Blackmagic Sdi to Hdmi Converter ?
The specs say nothing about embed hdmi audio

thanks

Michael Cinquin


Final Cut Pro - Avid Media Composer editor
DaVinci - Color - Baselight colorist
Color profiles for Color
http://www.michaelcinquin.com/tools : tools for FCP | Color | RED | subtitles | Cinema Tools | Timecode - Keycode calculator