Magnetic Death to Your Ear Drums
The vast majority of my music consumption is through headphones. There are many advantages to this--it reduces outside distractions, clearly reproduces every detail of the songs, and allows me to pick up on production that plays with the stereo channels. But there are also disadvantages, the biggest of which is that, from album to album I have to adjust the volume. That's even worse when playing my entire library on shuffle. I've tried options such as the "Sound Check" on my iPod, but that just makes everything flat and shitty-sounding.
You would think that by now there would be some kind of standard or technology to make sure that everything is at the same volume. Sadly, that's not the case. And things keep getting worse.
A recent promo from groove/technical metal band Misguided Aggression is a particularly bad offender. Upon playing it, I quickly had to turn the volume down, literally all the way. Even so, it was an unpleasant listening experience, and despite two attempts I couldn't make it through more than a couple songs. As such, I issue summary judgment against the band. (With a cheap pair of ear buds you wouldn't have that problem so much, because they lose a lot of signal between the player and the speakers.)
The Why
Why do people want to make the production louder in the first place? The simple fact is that people like their music loud. It sounds better when it's loud. When you have your own volume control, you can turn it up yourself, but this problem began with jukeboxes, where no one adjusted the machine's volume between songs. If your song was louder than the one that preceded it, then it sounded better, at least in an environment where there is a lot of background noise or the speakers are of low quality. This resulted in labels, producers, and musicians engaging in an arms race to make their recordings louder, to sell more singles.