Artiphon's method involves creating a high-quality muli-instrument device that uses an iPhone or iPod touch as its brain.

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The idea is that nano-vibrations would change the quality of the instrument itself based on acoustics, the environment, humidity, or even playing style.

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Officials from the FAA and the Japanese transport ministry on Monday began checking the quality control at Kanto Aircraft Instrument Co.

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So he set out to create an instrument so simple that people could easily understand how it tracked the quality of their client relationships.

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Electric guitar collecting also focuses on an instrument's provenance (past ownership) whereas acoustic guitar collectors emphasize the importance of tonal quality and craftsmanship.

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