Samsung PX5ISDBA E-Manual page 163

If the sound is abnormal when playing MP3 files, adjust the
N
menu. (An over-modulated MP3 file may cause a sound problem.)
Sound
Playing selected music
1. Press the
2. Select the desired music.
The
c
N
3. Press the
◀
You can select or deselect all music pressing the
N
(Edit Mode) button.
{
mark appears to the left of the selected files.
TOOLS button and select Play Selected Contents.
Select All
English
in the
Equalizer
/ Deselect All.
▶