Dynamics are essential to a good live musical performance.

We often think of dynamics as volume variations. But it also has to do with varying the levels of performance intensity, sometimes expressed in manner rather than loudness. A singer, for example can change the approach from a soothing lilt to a sharp hiss, all with the same volume...but the dynamics come from varying the style of emotion or level of passion. Same with a trombonist who goes from legato to staccato--dynamics.

In recording, it will be difficult to "bring back dynamics" because the marketplace is driven by short attention spans, and volume grabs attention. Not many people want to be the first to lower the volume and have the "wimpy" track that plays softer than the ones before and after...too bad.

http://www.soundclick.com/MarkKaufman