“Our singers don’t need microphones” has been the billboard boast of Lyric Opera. And it’s true for the usual fare. But when Lyric did a much-admired Show Boat last year as part of its regular season, they did need amplification, and they needed more than they had. In parts of the 3,600-seat house, some spoken parts of the show were lost.

That’s been fixed for Oklahoma!, opening this weekend for a 16-performance run, says deputy general director Drew Landmesser. Scheduling it as a postseason offering aimed at a general audience (as opposed to opera regulars) freed them up to get the place wired.