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What is it called? What would you like it to be called, maybe we can find some name for it that people can recognize anywhere.
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in german it's called
zweikanalton, which i would translate to something like
dual channel audio.
on TV remotes it is often labeled
I / II.
but maybe it isn't necessary to choose one name to fit all: as the whole interface is translated to different languages anyway, you could call the feature
SAP in us-english,
Zweikanalton in german,
son bicanal in french and so on...
what i meant with the feature being named different in europe is that it may use a different technique.
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I'm not aware of the technical challenges envolved, but I'm not sure if recording multiple audio streams can be done (hell, I'm not even sure if tv cards can tune into SAP!). Your idea could be an extra option though: 3 Record both audio streams
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again i can only speak for the situation in switzerland (and probably large parts of europe): it IS possible.
in my normal work-pc i have a cheap capture card (no mpeg encoder) from hauppauge. when i watch a broadcasting with two different audio channels using DScaler, i can switch through audio modes (stereo, mono, lang1, lang2).
stereo gives me one language in the left channel AND the other language in the right channel. so i can LISTEN to both of them at the same time.
when i want to RECORD a movie with both languages it's a bit tricky. either the software or the driver or the capture card switches to the first language, disabling the second one. there is a
tool from hauppauge.de that allows to set the audio channel to use (works only with WIN-TV PCI series). so i have to do this: 1. tune station with dscaler then close dscaler 2. start the tool from hauppauge and select stereo (it remains active in the system tray) 3. use virtualdub to capture.
now most people use more advanced capture cards like the PVR series from hauppauge. but i am sure that all of these cards are able to record both languages because they're able to record normal stereo broadcastings (it's exactly the same system). the tricky part seems to be preventing the driver / capture card / whatever to interfere and switch to one language.
i don't know what the situation is with DVB cards or HDTV tough...
greets,
fingerswinger