Browsing the iTunes video store, I noticed that the audio in the music videos always leaves about 7 dB of unused headroom compared to the audio-only counterpart. So I extracted the audio from a greenday video, normalized it to fill in the 7 unused dB, and compared it to the audio-only version. The waveform on the left is the normalized video music, and on the right is the audio only music, which I reduced in gain to the same perceived loudness as the video version. To my ears, they both have identical commpression, but that last little bit of volume (~3 dB from the looks of it) is given to the "CD" version. The snare and bass drum pop is much more dynamic sounding on the left, than on the right. For you all who work in mastering for video, could you comment if this is a common practice to: 1. leave so much headroom in audio destined for video 2. back off on the volume for greater dynamics in the video version If I'm hearing what I think I'm hearing, I'll never buy an audio-only song from iTunes again if they also offer a video for it. I'll gladly pay $1.99 to get both the video, AND more dynamic music once I extract it and normalize it.