If you’re a regular concert goer, and you happen to either be close enough to the stage or own a pair of opera glass or good birding binoculars, you’ve noticed those portable plexiglass things scattered about different parts of the stage.  Mostly they’re located at the back of the cello and second violin sections, and behind the woodwinds, and between the timpani and the trumpets.  Why are these unsightly things on stage in the first place? [Read more →]