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by minitrollster 5150 days ago
>With electronic/techno music you see where the intro/beats are. With other music you can see where the intro ends, the chorus repeats, instrumental solo, ...

Absolutely not you don't see that, how can you see where anything starts or ends, when it's not a temporal representation? The only thing it represents is the presence (or lack thereof) of frequencies in a song. For example, what does this http://i.imgur.com/QRka5.png tell you about the song? Can you tell where the intro or chorus or whatever else begins or ends? A temporal representation works way better because you can skip to parts of a song. A spectrum can't let you skip to anything, nor can it give you any information that the general population would like to know about a track.