Piezo elements have been used for years under the saddles of acoustic guitars, but when manufacturers started making them available as individual pickups for each saddle of electric instruments, things started to get interesting...

By installing piezo pickups under each saddle you give each string its own seperate signal. These individual signals can be used for splitting the treble and bass strings into seperate ouputs for two-hand tapping techniques without cross-talk. Or, each string can be run to its own stereo blend pot for true stereo panning.

Piezo crystals operate on string pressure instead of vibration meaning the response is virtually instantaneous which makes them the perfect candidate for yet another challenging task; triggering MIDI systems.