1999 release ** "Somewhere between Autechre and Haujobb lies Xingu Hill. If there were an industry award for sleeper of the year, Xingu Hill might just win with this delicious silicon tote of complicated electonic structures. With a scattered discography of scarce releases, Belgium native John Sellekaers manages to protrude from the woodwork on the increasingly notable Ant-Zen sublabel Hymen, for this beautifully composed 50 minute daydream. Packaged in a canvas wrap of exquisite artwar courtesy…