Just for the DJ sets alone, the recent Short Circuit Presents Mute two-night festival at London’s Roundhouse would have been worth the price of admission alone — Mute Records labelmates Moby and Depeche Mode’s Martin Gore were both spinning. But the real treat, by all accounts, was the re-emergence of classy synth-pop duo Erasure — keyboardist Vince Clarke and singer Andy Bell — who brought up two incredibly special guests for the affair: Undertones legend Feargal Sharkey and Clarke’s old Yaz partner Alison Moyet. Now that was one heck of a hot ticket. But it signaled something greater — Clarke (after his recent reunion tour with Yaz) and Bell (fresh from his last solo album, “Non Stop”) were back together again, with a new album called “Tomorrow’s World” in the pipeline for fall release. It’s the duo’s first record in four years, and it was produced by red-hot UK dance-scene artist Frankmusik, who’s already remixed Lady Gaga, Ellie Goulding and The Pet Shop Boys. The tracks were penned in London, New York and at Clarke’s secluded cabin studio in Maine. And a tour — their first in five years — has just been announced. It hits the Fox Theater in Oakland on Oct. 4. For more information, visit erasureinfo.com.