An introduction to how spectrograms help us "see" the pitch, volume and timbre of a sound. The spectrogram used in this video is called Signal Spy for iPad: https://itunes.apple.com/BE/app/id888698146?mt=8&ign-mpt=uo%3D4 For more information, check out "Spectrograms: Instruments and Timbre": https://youtu.be/P9Kozlt0tTg