This is a simple MP3 player for the PSP. With the display set to minimum brightness the battery should last at least 9 hours. With the display off the battery should last at least 11 hours.

LightMP3 is ditributed under GNU General Public License.

Changes:

-Added: Options screen
-Added: muted volume in settings file
-Added: Fadeout when skipping track
-Added: Option to set initial brightness check (on with warning/on without warning/off)
-Added: Volume boost value is saved in the settings file and restored at startup
-Added: MP3 playback via Media Engine (plays fine with CPU @ 20Mhz) (many thanks to joek2100)
-Added: ATRAC3 playback (*.aa3, *.omg, *.oma) via Media Engine (plays fine with CPU @ 20Mhz) (many thanks to joek2100)
-Added: FLAC playback (via libFLAC). Unfortunately plays fine with CPU @ 130Mhz. (many thanks to JLF65)
-Added: Automatic cpu clock based on filetype.
-Fixed: Directories are now listed before files.
-Fixed: Conflict with Music prx (the module is stopped and unloaded at startup).

http://sakya.altervista.org/new/index.php?mod=none_lightmp3