Pianospectrum

Device from the steampunk short story "The Colours of the Masters" by Sean McMullen, first appearing in the March 1988 issue of Fantasy and Science Fiction magazine.

It was invented by Hiram Searle in the early 1800s, as a method of recording sound.

• https://eidolon.net/?story=The%20Colours%20of%20the%20Masters&pagetitle=The+Colours+of+the+Masters&section=fiction
• https://seanmcmullen.net.au/the-colours-of-the-masters/