CITROEN DS4 Owner's Handbook Manual page 366

04 AUDIO
DAB (Digital Audio Broadcasting)
Digital radio
Digital radio provides a superior audio quality and also additional
categories of traffi c announcements (TA INFO).
The different "multiplex services" offer a choice of radio stations in
alphabetical order.
Change band (FM1, FM2, DAB, ...)
Change of station within the same "multiplex service".
Start a search for the next "multiplex service".
Long press: select the desired categories of
announcements from Transport, News, Entertainment
and Flash special (availability according to the station).
When the radio station is displayed in the screen, press on " OK " to
display the contextual menu.
(Frequency hopping (RDS), DAB / FM auto tracking, RadioText
(TXT) display, Information on the station, ...)
Digital radio - DAB / FM tracking
"DAB" does not have 100% coverage of the country.
When the digital signal is weak, "DAB / FM auto tracking" allows you
to continue listening to the same station, by automatically switching
to the corresponding analogue "FM" station (if it exists).
Press the " Menu " button.
Select " Multimedia " and confi rm.
Select " DAB / FM auto tracking " and confi rm
If "DAB / FM auto tracking" is on, there will be a difference of a few
seconds in the programme when the system changes to analogue
"FM" radio, with sometimes a variation in volume.
When the strength of the digital signal is good again, the system
automatically switches back to "DAB"
If the "DAB" station you are listening to is not available on "FM"
(" DAB/FM " option barred), or if "DAB / FM auto tracking" is not on,
the sound will be cut when the digital signal is too weak.