| 摘要 |
A variable resistance device for a portamento performance on an electronic musical instrument wherein a conductive coiled spring is held by a supporting member and an elongate resistor is so held by the supporting member as to face the coiled spring at a small space. The elongate resistor is used to determine the output frequency of a tone signal generator. Depression of the coiled spring with player's finger causes it locally to contact the resistor, and the continuous shift of the player's finger successively varies resistance across the coiled spring and resistor, thereby providing a portamento performance.
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