CITROEN DS4 Owner's Handbook Manual page 331

08 MUSIC MEDIA PLAYERS
CD, MP3 CD, USB PLAYER
INFORMATION AND ADVICE
The audio equipment will only play audio fi les with ".m4a, .m4b,
.aac, .fl ac, .ogg and .mp3" fi le extensions and with a bit rate of
between 32 Kbps and 320 Kbps.
It also supports the VBR (Variable Bit Rate) mode.
No other type of fi le (.wma, .mp4, .m3u...) can be played.
The sampling rates supported are 11, 22, 44 and 48 KHz.
It is advisable to restrict fi le names to 20 characters, without using of
special characters (e.g. : " " ? ; ù) to avoid any playing and displaying
problems.
In order to be able to play a recorded CDR or CDRW, when recording
it is preferable to select the ISO 9660 level 1, 2 or Joliet standard.
If the disc is recorded in another format it may not be played correctly.
It is recommended that the same recording standard is always used
for an individual disc, with as low a speed as possible (4x maximum)
for optimum sound quality.
In the particular case of a multi-session CD, the Joliet standard is
recommended.
The system supports USB mass storage or IPod
devices via the USB port (suitable cable not supplied).
Control of the peripheral device is with the audio
system controls.
Other peripherals, not recognised on connection, must
be connected to the auxiliary socket using a Jack cable
(not supplied).
In order to be read, a USB memory stick must be formatted
FAT 16 or 32.
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