CITROËN C4 Owner's Manual page 244

03 AUDIO
MP3 CD
INFORMATION AND ADVICE
The MP3 format, an abbreviation of MPEG 1.2 & 2.5 Audio Layer 3,
is an audio compression standard which permits the recording of
several tens of music fi les on a single disc.
In order to be able to play a recorded CDR or CDRW, when recording
it is preferable to select standards ISO 9660 level 1.2 or Joliet.
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 audio equipment will only play fi les with the extension ".mp3"
with a sampling rate of 22.05 KHz or 44.1 KHz. No other type of fi le
(.wma, .mp4, .m3u...) can be played.
It is advisable to restrict fi le names to 20 characters without using
special characters (e.g. " " ? ; ù) to avoid any playing or displaying
problems.
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