Acer MP-320 User Manual page 34

English Manual
"Normal/All/Shuffle". Press the "+/-" button to switch
among "One Song/One Folder/All Songs". Different
icon displays when different playback mode is set,
press the "Menu" button to confirm and return to the
main menu.
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Use "Setting/Bass Boost" to set the bass boost, which
is classified into 15 levels. After entering the setting
menu, press the "Right/Left" button to adjust the bass
boost level. Press the "Menu" button to confirm and exit
the setting menu.
Use "Setting/Treble Boost" to set the treble boost,
which is classified into 15 levels. After entering the
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