LightMP3 is a MP3/OGG Vorbis/FLAC/Atrac3+ player designed to drain little energy from your battery. Can decode MP3 and ATRAC3+ via Media Engine with CPU set at 20Mhz, OGG Vorbis with CPU set at 50Mhz, MP3 via libMAD with CPU set at 70Mhz, FLAC with CPU set at 100Mhz. With battery at 100% and display set to minimum brightness it should last 9 hours.

With battery at 100% and display turned off (press START while playing a track) it should last more than 11 hours.

Features:

-Added: Scrolling text when string is too long in all menues and song title
-Added: Setting to choose the tab to start from (START_TAB)
-Added: Total number of frames red from Xing frame (faster opening of VBR mp3 file, if Xing is found)
-Fixed: Crash when seeking FLAC files
-Fixed: Navigation in the Media Library (when pressing circle you’ll be taken to the previous selection, not on the main menu)
-Fixed: Added setting to set CPU clock for WMA
-Fixed: Track restart when pressing L on WMA, FLAC, ATRAC3(+), MP3 when played with libMad
-Fixed: Suspend and resume for WMA
-Fixed: Changed the default setting to play MP3 with Media Engine
-Fixed: X/O button swap (please note that help screen will always say X=Confirm, O=Cancel, I din’t changed it)
-Fixed: Bug when creating playlist from Media Library (the first 500 tracks were repeated)

http://forums.qj.net/psp-development-forum/158054-release-lightmp3-version-2-0-0-rc4.html