Because a CMOS sensor scans video line by line in sequence, fast moving objects are distorted during the scanning sequence. The morphing and distortion are called the rolling-shutter effect, which is considered an artistic photographic technique like strip photography and slit-scan photography. But the effect can only be seen in a camera viewfinder or a PC screen. It is usually not perceived by the naked eye.

To cope with this limitation, Wobble Strings allows the rolling-shutter effect to be observed in real time using spatially divided stroboscopic projection. The system produces a wobbly slow-motion effect by generating animation of sweep lines. It also alters the color and texture of strings using a projection of the color and texture sweep lines. Guitar players can monitor their strings’ oscillation, and the audience can experience an artistic visual effect that corresponds with the guitar sound.