Metallica’s And Justice for All Album: 21% Intro

I’ve been thinking a lot about the concept of an intro in popular music. Do long, non-vocals introductions work? Are they common?

An intro time is the number of seconds of music played before vocals enter the song.

The Intro Ratioâ„¢ is the number of seconds of an intro divided by the songs total number of seconds.

There are cases when this ratio can be negative. Think songs starting out A-Capella. Instrumental songs need not apply.

Since the thoughts were originally spawned by Metallica’s unnecessarily long intro to “King Nothing”, I thought I’d analyze a Metallica album.

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An instrumental song, “To Live Is To Die” was omitted.

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