We look at a drummer, and see a more audible form of art. Sure the person operating the percussion instrument is present, in a storm of drum sticks and sweat; but it's the rythmic intonations, and the harder emphasis on key strikes of the drums that grab the attention.
That has now come to an end, as Polish artist Odaibe developed a new form of digital art, which tracks the sticks of a drummer in motion and creates an intriguing line pattern, showing the aftermath of just how much movement the tempo keeping-percussionist actually makes. He has called it, rather appropriately, the Portrait of the Ghost Drummer: quite literally one of the rawest forms of visual representations of music you can get.
Motion capture was done via a Vicon MX system, combined with the 3D capabilities of Cinema 4D. It's certainly an interesting take on the digital art form.