Mod turns the PSP into a pretty cool looking little VU Meter. The hack is the work of “foo foo” and it works as advertised. Spin up an audio track, and watch the little lights pump up in down with the levels. It’s no Korg DS-10, but then again few things are. At the very least this hack would provide you with literally minutes of fun as you wait for Sony to get its act together and release the mythical PSPad or PSP Phone.”]
Source: https://gizmodo.com/vu-meter-hack-turns-psp-into-something-functional-5487543