Lugones' "Metamusic"

Wow, Lugones has got to be the master of early 20th Century technobabble! This is a story about an inventor who builds a machine that allows for a visual expression of sound. A man tells the story of his friend, who is a music enthusiast and an amateur scientist. One day, he gets invited to his friend's house to see the invention. Then they discuss the theoretical basis for the sound visualizer, and this takes up at least a good third of the narrative. I still found it fairly impressive, since even a century later, Lugones is exploring some interesting ideas, making this story closer to hard sci-fi.