| 摘要 |
<p>A method and apparatus for sensing the velocity of key motion in a keyboard operated musical instrument, in which sensors (10) having a polymer piezoelectric film (18) laminated to a mylar backing material (20) are mounted in proximity to the keys (12) of a keyboard operated musical instrument. When deflected by the keys (12), the sensors (10) produce analog output voltages proportional to the velocity of key motion. The analog signals are then converted to digital signals and processed by a digital microprocessor (36) to represent the velocity factor component of musical information in Musical Instrument Digital Interface (MIDI) or other digital formats. The digital data is then presented directly to a reproducing musical instrument or recorded on an electronic storage media.</p> |
