Spanish PSP Developer Viciado-TrueStory has released a new version of PSP BeatBox for your PSP which brings the release up to Beta 3. If you are running CFW on your PSP and have a passion for music and creating beats then you definitely want to check out this cool piece of PSP homebrew. The app is still in its beta stages but is stable enough to run on your PSP and the developer says he will be releasing future updates soon. Check out the directions on how to use it below.
controls:
On the menu
Digital Pad Up, Down: Move through the menu.
X: Select an option.
Controls on the sounds
X: Bombo.
Square: Inward.
Triangle: Speeding.
Circle: Box.
Start: Back to main menu.
Source