In certain Houston circles, the words "Lexington Street" are spoken in the hushed, reverent tones reserved for other bohemian enclaves like San Francisco's Haight-Ashbury or Chicago's Wicker Park. For several years in the early to mid-'90s, the leafy avenue in Lower Montrose (near the 59 spur) was home to a cadre of adventurous artists and musicians including members of Sprawl and Charalambides, whose "free noise" jams tipped the first domino toward Houston's eventual status as a focal point of abstract, impressionistic music. Leading the charge were Sprawl trombonist David Dove and Paul Winstanley, a New Zealand expat who funded his experiments with bass guitar and synthesizers in a reggae band and as a soundman. Dove and Winstanley (whom Dove now calls his mentor) eventually broke away from the Charalambides folks and recorded 1995's rough-hewn A before Winstanley headed back to New Zealand the next year. He hasn't been back until now, and Sunday's show with Dove's Nameless Sound Ensemble — expect plenty of low-end improvisation, bizarre electronic squall and maybe a piece or two from A — marks the end of Winstanley's all-too-brief homecoming residency; after the show, he and Dove embark on a national tour.