VDrum is a drum kit simulator game for PSP. It is unlike other drum apps/games currently out in that each drum is controlled by a different button and is not set up on a time line like PSPRythm and PSPKick. It is currently in its early stages.

http://forums.qj.net/f-psp-development-forum-11/t-release-vdrum-drum-kit-simulator-122447.html