| 摘要 |
A volume controller for an electric musical instrument of portable type, in which an audio-signal transmission circuit is provided in the signal path of the electric musical instrument. The audio-signal transmission circuit includes a variable circuit element. A pendulum is provided in a casing of the electric musical instrument so as to be swung about a supporting shaft. The value of the variable circuit element is controlled in accordance with the swing of the pendulum to vary the sound volume of the electric musical instrument. A level may be provided on the casing to indicate the controlled condition of the pendulum. A stopper may be provided to tempororily stop the swing of the pendulum.
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