Waterfall plot of a musical piece:

I was listening to musical piece Minuet in G major (Johann Sebastian Bach/Christian Petzold) tonight that I decided to record the sound and plot the time signal, FFT Spectrum, Waterfall & STFT plots. Here’s the result, I like it. If you look at the waterfall from the frequency point of view you can detect a slow sine motion from note G (392 Hz) to note E (660 Hz) in the frequency domain. It sounded quite interesting to me so I wanted to share it with you friends!