My german is not topnotch, but you might want to try the 2lang plugin for automatic audio selection.

with year old images based on OE1.5 you can use my script /usr/script/Set_Audio_Language_by_Priority.sh

with current OE1.6 stop work cause no more posible such commands as sed; cat; grep.. in the bashscript when it call from python
Change AudioTrack by Language Priority

enigma2 merkt sich die letzte audiospurauswahl eines kanals. wenn du wieder drauf gehst, dann sollte eigentlich dieser kanal ausgewählt werden. eine 'audio priority' analog e1 lässt sich leider nicht umsetzen.

remember last used is ok, BUT ..
1. that information is gone after rescan transponders
2. couple of music services on 28E as first audiotrack have some silent track = no sound on first zap
3. some services have provide additional tracks just temporary
...

but in case e2 wroten by german developers we will newer see that feature cause they know only two audiotracks - german mpeg2 and german ac3

some movement in this way i saw in OpenPLI image, but that way i think is little wrong
1. setup were too deep in menu sections
2. prefereable track's titles must be hard coded into python code