This simple plugin will boost up your PSPs sound.
--- 6.2x-6.6x ---
-- Added support for 6.60
--- 6.2x-6.3x ---
-- Add patch for 6.20TN(HEN).
-- This is beta version. More boost up PSPgo sound.
-- support 05g model.
-- support 04g 07g 09g model.
-- bug fix.
-- first release.
Hold Home + R to toggle between earphone and speaker.
You can use PSP speaker while the earphone has connected.
This feature is available in only XMB.It cannot use in game.