Timespan, a new compilation on Pittsburgh Tracks, draws recordings, most of them unreleased, from every era of Rudiman's catalog. Where Synthdrome Vault Archives felt off-the-cuff, Timespan is a closely considered and lovingly designed product, especially the vinyl version, where each side hits a different part of Rudiman's sound. The first record is pure rave heat—the A-side more electro-flavored, the B-side more techno, but neither neatly fitting those descriptions. "Ultrafrequey," despite its fiendishly quick rhythm (138 BPM), has a housey streak, with bright chords and the word "freak!" on every measure. "75 All The Way" has the same kind of rich contrast, with blunted synths hovering over a rowdy electro beat.
The second record is totally different, beginning with the three-part "TimeFrame"—two lush dub techno groovers followed by a kind of glittering synthapella. The final tunes split the difference between what's come before. "Detachable Needs" is techno with the sloshing motion of a stormy sea. "In Light / In Darkness" and the digital-only "Turn Bad," two cuts of languorously slow dub house, finish the collection on a chilled note—a far cry from the storming energy with which it began.
There's an element of mystery in the titular timespan of this collection—these tracks are so consistent that it's almost hard to believe you're hearing a career-spanning compilation. "Some songs are almost two decades old," Rudiman says in a note on the album. "Some are fresh. It's a paragraph written with words that have years between them. Somehow they still all sort of make sense together." That, too, would be an understatement.