Philips HP1500 - Manual (Page 21)

8 Dolby Pro Logic II: the ‘Dolby Pro Logic II’ menu field indicator will be
illuminated in yellow in case of a digital stereo signal.
In case of a digital multichannel signal, Dolby Pro Logic II will not be
illuminated (since it is not a valid option for such signals).
Press the Dolby Pro Logic II button to activate Dolby Pro Logic II.
Pressing this button repeatedly will allow you to toggle between ‘MUSIC’
and ‘MOVIE’ mode and bypass mode (= MUSIC and MOVIE LED are both
off). In case of an digital stereo audio signal: the mode, which was selected in
previous listening sessions, will be activated first. By pressing the Dolby Pro
Logic II button again the other mode will be selected.
9 Dolby Digital or DTS: in case of digital multichannel signals, the base station
will automatically detect whether the signal is Dolby Digital encoded or
DTS encoded. In any of these cases Dolby Headphone will be activated
automatically.
10 Dolby Headphone: Pressing the ‘Dolby Headphone’ button repeatedly will
allow you to toggle between the different DH rooms and the by-pass
mode (= DH1, DH2, DH3 are both off).
By-passing Dolby Headphone processing is not possible in case of
multichannel Digital audio signals.
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