Singapore-based DJ and producer Rajesh Hardwani has a vision of a pan-Asian massive united by a shared passion for ethnic sounds infused into progressive beats. Black Asia Volume 1 is the culmination of Hardwani’s philosophizing: a heaping scoop of field recordings from his own travels, everything from Japanese string masters to Malaysian street musicians layered in breakbeat and drum & bass. When it works, like on “Tim Sum Vindaloo,” Black Asia is decent latter-day Asian Underground stuff, but too often, R-H is content to stay ho-hum generic.