This is a spectrogram of
Louis Armstrong's opening solo in West End Blues. It shows what a
wide pitch range he covers, how rapid he plays the
notes, their different time durations, and different amounts of
vibrato. The spectrogram also provides a visual record of the repeated
triplets he uses as
a rhythmic device. You
can listen to it on Spotify (it begins right at the
start):
You can buy the recording from Amazon, iTunes, or
Spotify.