Samsung UN19D4000 E-Manual page 146

While a music file is playing, press the TOOLS button to access additional
N
functions such as
Information.
N My Contents
extensions are not displayed, even if they are saved on the same USB
device.
If the sound is abnormal when you play MP3 files, adjust the
N
in the
problem.)
◀
Repeat
only displays files with MP3 file extensions. Other file
menu. (An over-modulated MP3 file may cause a sound
Sound
Mode, Shuffle Mode,
English
Mode, and
Sound
Equalizer
▶