A Cicada fan mentioned to me, after I had submitted a cicada photo from a different event, that there may be a little known species in my area. They mentioned that sound recordings might help ID cicadas. I later realized i have this recording from last summer of what may be a cicada.

A little more than halfway through the recording, one of the insect voices drops off, leaving 1+, then resumes. So, there's at least two different insects calling at the same time, for most of the recording.