Soundcloud Waveforms

[DubStudio]

Anyone here know how the waveforms are generated in Soundcloud and whether its possible to do the same on one's own server? Say I have a directory of songs, is there a way to generate visible waveforms from them that I can look at in the browser, without actually downloading the tracks?

[Siem]

Originally Posted by DubStudio

Anyone here know how the waveforms are generated in Soundcloud and whether its possible to do the same on one's own server? Say I have a directory of songs, is there a way to generate visible waveforms from them that I can look at in the browser, without actually downloading the tracks?

Yes, it's possible with SoX ( SoX - Sound eXchange | HomePage ). I think they used it.
You could use a PHP (or whatever) script to run this command line utility and create a picture with the waveforms or a file with some numbers to generate the waveform with in flash. ImageMagick can also help you to create the waveform picture later.