1. Audio Spectrograms
Physics of Music

2. Frequency Spectra are Cool…

3. Frequency Spectra are Cool…

4. But spectrograms are cooler

5. Another view

6. Another view

7. And again…just for clarity

8. Reading/Interpreting Spectrograms

9. What would this sound like?

10. What’s a Spectrogram? I want one!
Number of samples
That overlap between
Successive snapshots
Track Number
>> S = drawSpectrogram('jamSess3.wav', 1, 512, 100, [0:1:2000]);
Width of sampling window
Frequencies at which spectrogram is computed

11. Slide Whistle Jam Band

12. Logarithmic B/W color scale
Easier to see relatively quiet sounds (desirable)
But now you can see some “noise” too (undesirable)