Loudness war
Posted: Thu Jun 29, 2006 9:50 pm
If you're into the technical stuff, get Mastering Audio by Bob Katz and read his discussion of this. One of the most fascinating parts of the book to me was the appendix where the processors used by radio stations were discussed, how they work and what happens when you run hypercompressed music through them.
Besides the article on replay gain, wikipedia also has one (still needs some work) entitled loudness war which discusses this.
An interesting experiment is to rip some of your favorite old and new CDs into a good audio editor (I use Sound Forge, I'm sure Audition, Peak and Wavelab can all do this) and get the statistics for the RMS level of a track. I did this on some tracks from a recent P.O.D. CD and they were about -9 db; taking my old White Zombie La Sexorcisto CD which was balls out heavy metal and it only measured I think -14 db. If you didn't change the volume knob, the P.O.D. track would sound much louder than the WZ one. But of course you're going to set the knob where you like it, so at the same listening level guess which sounds better? I'm not saying the WZ CD is any model of brilliant mastering, just showing the gradual degradation of this issue over several years. Although I haven't actually measured it, the Chili Pepper's Californication record is a terrible example of one where all the knobs on were turned up to 10 in mastering. On top of that, the radio station processors can be adjusted for good sound, but again station managers simply turn up all those knobs to 10. I've heard songs where the last note fades out on the record, but on the radio the level STAYS THE SAME and background noise just comes up. It's an eerie effect.
Of course, almost no radio stations play much music anymore and the ones that do just play cringeworthy stuff in my opinion...
Besides the article on replay gain, wikipedia also has one (still needs some work) entitled loudness war which discusses this.
An interesting experiment is to rip some of your favorite old and new CDs into a good audio editor (I use Sound Forge, I'm sure Audition, Peak and Wavelab can all do this) and get the statistics for the RMS level of a track. I did this on some tracks from a recent P.O.D. CD and they were about -9 db; taking my old White Zombie La Sexorcisto CD which was balls out heavy metal and it only measured I think -14 db. If you didn't change the volume knob, the P.O.D. track would sound much louder than the WZ one. But of course you're going to set the knob where you like it, so at the same listening level guess which sounds better? I'm not saying the WZ CD is any model of brilliant mastering, just showing the gradual degradation of this issue over several years. Although I haven't actually measured it, the Chili Pepper's Californication record is a terrible example of one where all the knobs on were turned up to 10 in mastering. On top of that, the radio station processors can be adjusted for good sound, but again station managers simply turn up all those knobs to 10. I've heard songs where the last note fades out on the record, but on the radio the level STAYS THE SAME and background noise just comes up. It's an eerie effect.
Of course, almost no radio stations play much music anymore and the ones that do just play cringeworthy stuff in my opinion...