Jum's PXDrum Drum Machine is a simple sample-based drum sequencer for the PSP. PXDrum Drum Machine can be used to compose drum tracks and then playing them back as a backing track for other instruments or as a learning tool if you're a drummer.

The download includes a quickstart guide and a readme, both of which you should read before installing and using this app. Also bundled in the download along with the PSP binary is a binary for Ubuntu Linux.