As I’m nestled between the drapes of lush green fronds in the Fern Room at the Lincoln Park Conservatory, I become aware of the ambient sounds. I hear the steady trickle of nearby water and the bird calls that fill the space. As I wait for the afternoon performance to start, the bird calls begin to demand a bit more of my attention. I hear what sounds like a whistle and then what sounds like a human call. Then, clicking, brief pauses, more clicking, and suddenly a layer of bird calls that begin to sound more and more human as the moments pass, all followed by what I’m sure is a human sound. Click. Pause. Bird call? Chirp. No, definitely a human call. Wail. Human call. Pause. As I become more aware of the presence of the piece, Lakshmi Ramgopal and her ensemble, clad in all white, take their places for the final performance for this installation. This environmental soundscape, which feels simultaneously personal and celestial, is Lakshmi Ramgopal’s installation “A Half Light Chorus” at the Lincoln Park Conservatory as part of …