If the occasion that gave rise to “Sonambiente” was the three-hundredth anniversary of Berlin’s venerable Akademie der Künste, this month-long “Festival for hearing and seeing” was resolutely oriented to the future of Germany’s new/old capital. In the process, what might have been just one more exhibition of electronic exotica was not an exhibition at all, but a vast program of installations, performances, concerts, film screenings, and other pockets of creativity (such as the nightly “Sonambiente Sound Bar” at the Berlin Prater beer garden) scattered throughout the city. At the core of this