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Clipping in popular music

  • Artigo

Aside from the distortion artifacts, one of the biggest problems that results from clipping is a loss of dynamic range.  Remember that the dynamic range of a signal is effectively the difference between the maximum output level and the noise floor.  When you clip a waveform, you lower the maximum sample value, which lowers the output level and reduces dynamic range.

This can happen especially when you amplify a signal.  Amplification increases all parts of a signal, including its noise floor and its maximum value.  Normally, these two values increase by the same amount, so the ratio between them stays the same and dynamic range is unaffected.  Unfortunately, a signal that is amplified too much has to clip at the top end, and that's when DR suffers.

So the moral here is don't overamplify your music, right?  That seems easy enough.  The problem is that popular recording studios don't listen.  Recall that, superficially, louder music sounds better.  Better sounding music sells more discs, and so it pays for the studios to master their music as close to the clipping level as possible.  "But wait," the studio says, "most people are tone-deaf anyway.  We can get it just a little louder than our competition if we clip a little bit off of the peaks."  The competition responds in kind, clipping just a little more, and the result (as Larry scooped me on) is why popular music has terrible dynamic range.

The following articles tell the sad story far better than I can.  I encourage you to give them a read.

https://www.mindspring.com/~mrichter/dynamics/dynamics.htm (mirror)
https://en.wikipedia.org/wiki/Loudness_war
https://www.prorec.com/prorec/articles.nsf/articles/8A133F52D0FD71AB86256C2E005DAF1C
https://www.austin360.com/music/content/music/stories/xl/2006/09/28cover.html

And one of my favorite illustrations: https://recforums.prosoundweb.com/index.php/mv/msg/4286/0/0/0/

And now you know why serious audio aficionados stick to the classics.  :)

Comments

  • Anonymous
    February 08, 2007
    Third link (prorec.com) appears dead.  I'm getting timeouts.I like the visual, though. :)
  • Anonymous
    February 09, 2007
    The comment has been removed
  • Anonymous
    February 27, 2007
    Any chance then of implementing ReplayGain support in Windows Media Player etc.?http://en.wikipedia.org/wiki/Replaygain
  • Anonymous
    May 23, 2007
    Larry pointed me to a really cool video that graphically and audibly demonstrates the effect of the Loudness
  • Anonymous
    August 02, 2007
    The comment has been removed
  • Anonymous
    September 17, 2008
    Metallica's new CD, Death Magnetic, is pretty good.  Certainly it is better than St. Anger although