Beautifully strange music from a composer in Spain named José Manuel Berenguer, a.k.a. ‘jmb’. Free mp3s on his website, though he strongly suggests that you contact him for higher quality versions. The players below have a couple of them queued up. No point trying to describe it, just listen.
Visit http://www.sonoscop.net/jmb/musicas/index.html for more info.