Talvin Singh shot to prominence in 1998 when he won the Mercury music prize for his genre-bending album OK. Since then, however, he's shunned the publicity game while travelling to studios around the world to record the follow-up. The result is Ha, a curiously muted affair that smoothly combines traditional Indian instruments such as the sarengi and tabla with pumping drum'n'bass rhythms. Like so many other fusion albums, it all amounts to a series of pretty experiments that are musically interesting but leave the listener feeling largely unmoved.