GLSL & Sound
https://en.wikipedia.org/wiki/Table_of_vowels
Each picture below corresponds to a vowel from the table above. If a picture is missing, it’s because Wikipedia doesn’t provide a audio file for that vowel. How are these pictures generated? By creatively transforming FFT of the audio file. Rougly speaking, the radial coordinate corresponds to time, the angular coordinate corresponds to frequency and color correponds to pitch or musical note. Pictures are reversible: they contain enough information to recreate the original audio. If you want to listen to audio, find the corresponding vowel in the Wikipedia table.
Unrounded vowels
| . | Front | Central | Back |
|---|---|---|---|
| Close |  |
 |
 |
| Near-close |  |
||
| Close-mid |  |
 |
 |
| Mid |  |
||
| Open-mid |  |
 |
 |
| Near-open |  |
 |
|
| Open |  |
 |
 |
Rounded vowels
| . | Front | Central | Back |
|---|---|---|---|
| Close |  |
 |
 |
| Near-close |  |
 |
|
| Close-mid |  |
 |
 |
| Mid | |
||
| Open-mid |  |
 |
 |
| Open |  |
 |
Other sounds
An annoyed and an angry cat:
Singing birds:
Notes
https://soundshader.github.io/hss/?alog=4&bins=4096&cw=2048&ch=2048