Shazam Sounds like a Magic Word
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The player is presented with 13 different 30 second music clips. The first step is to correctly identify each of the thirteen songs, perhaps using a tool like Shazam.
Next you note each song's artist, and notice that taking the first letter of the artists names in order yielded ABOVE BASS CLEF.
And the clefs above bass are the TREBLE, FRENCH VIOLIN, or ALTO clefs.