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Properly label your ID tags and you can accomplish the same thing.

Rarely do I choose my music by attributes like "aggressive" "Happy" "Sad" etc.

Rather I enjoy listening to a few genres mixed together. Maybe Techno/Dance on one playlist or Jazz/soul vocals in another.

Moodlogic has been around a while. I believe it's creators actually worked for Apple at one time(at least a few of them)

Moodlogic sounds like a great product though. Just not too sure I'd pay money for it.
 
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