When I first got some monitor headphones, I listened to one of my favorite classical orchestra albums, and for the first time I could hear the wood of the stage floor creaking and the score pages flipping. In a moment of silence I could hear the faint sound of birds tweeting in the distance (it was recorded in an old Italian building, a large cathedral possibly, so maybe some birds got in? Idk).

You can’t just say that and not provide the album’s name

Ah sorry. It was early music ensemble Modo Antiquo’s recording of Corelli’s op. 6 concerti grossi.