Menu Settings Picture and Sound.
Audio type: Left, Right, Stereo or (!!) Close Menu
Digital Audio out: Stereo, Multi-channel or Close Menu
I think you are right, the first presumably refers to Scart and the latter to HDMI and Optical. There is no manual, so who knows? I would have thought that "Audio" was a superset of "Digital Audio!" Clearly not, as you can set Audio to Left and Digital Audio to Multi-channel.
I don't know where I got the HDMI/Optical mix confused. Either a senior moment or the menu has been updated? (Almost certainly the former!)
Scart does not have digital audio out, it's an analogue output for both video and audio. The scart output is analogue only ( PAL CVBS video (composite video and blanking, or RGB depending on the capability of your TV, and the setup options, and the scart socket you connect to) and stereo analogue audio with only SD video (max 720 x 576 pixels ).
Your second option allows you to select various audio output options for the analogue outputs (scart or the rca phono sockets, yellow CVBS video, Red and White Analogue Stereo with Red the right channel and the White the left channel). Neither has any connection with the digital outputs,
The menu has been the same since the first Humax HD satellite box ,( Foxsat HD) after an update in 2008.
I hope this helps.
The Foxsat-HDR has 3 analogue outputs, 2 scart sockets and a RCA phono socket output (Yellow - CVBS, Red and White Analogue stereo Audio}, Ant TV with a scart socket will be able to work with this.
It has two digital outputs.
HDMI which has HDCP protected digital video (with upscaling for SD channels to 1080i) and the option to downconvert the audio to a format with a format that any TV will be able to work with a digital input.
S/Pdif (Sony/Phillips interface. This can be either optical (normally called TOSlink (, or coax using standard RCA phono connections). The Foxsat has the optical option though cheap converters are available to convert in either format. SP/dif is only capable of digital audio. For a very long time if you had a Sky-HD box the only way to get true surround sound if you had the capability (AV amp and surround speakers) was by using the S/Pdif output),
Basically a manual would not help if you need to understand the basics. Earlier boxes had a much more comprehensive manual but the level of detail you want is not included.