Hi, AUX is assumed to be a 'non-B&O' source and thus would not respond to timer 'on' commands and is therefore not listed for such purposes. However, ironically, I have a Beocenter 2300 (Overture with no tape player) but when I set my AVANT timer to turn on 'TAPE' then the AUX input of my Beosound is selected (because it's assumed that the first additional source I would add would be an external tape deck maybe). But again, as I only have my PC connected to that socket then the PC does not turn on, of course, even though a 'TAPE.PLAY' beolink command has been sent by the AVANT. I used to have a Beomaster 5500 and the timer play AUX was not allowed either, if I remember correclty.
Jack
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