Canadian inventor and composer Hugh LeCaine took a different approach. In the late 1950s, he created an instrument called the Spectrogram, consisting of a bank of 108 analog sine wave oscillators controlled by curves drawn on long rolls of paper.

Who discovered spectrogram?

Although the apparatus Isaac Newton used in his work on the spectrum of light can be considered a crude spectroscope, it is generally recognized that the spectroscope was invented by Gustav Kirchhoff and Robert Bunsen around 1860.

When was spectrogram invented?

The spectrograph was invented during World War II at the Bell Telephone Laboratories. It was used initially for military purposes and classified until after the war, becoming available to civilian researchers only in the late 1940s.