I know that you're after PSP music that's free. Well, there are free sites, they do exist but there is still a cost to them. This is probably a cost that you would not want to incur.
There is an alternative and this is by considering membership of an unlimited download site. In particular, there are PSP download sites that offer unlimited downloads for a low lifetime membership cost, usually no more than $37.
The reason I have mentioned this is that these sites seem to offer the benefit of keeping costs low but at the same time maximizing choice, quality, security and value for money. No doubt, as the owner of a PSP, you will probably play games as well and many of these sites have got such a wide variety of choice that you will be able to download games as well as PSP music.
An important consideration is that these sites also provide sophisticated conversion software that will allow you, in one place i.e., the membership area, to download and convert a huge choice of PSP music and other files with ease.
In a way, the PSP music that you download is actually free but the cost is in joining the site. If you do the mathematics, it's not hard to work out that after you download 35 tunes you will have broken even and every tune, music video and game will be free!
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