| 摘要 |
An electronic device with faders. In order to enable a user to readily ascertain which of a plurality of faders belongs to the same group and which one of the faders in the group is a master fader, indicators of all of the faders in the group are lighted when the thus-set master fader in the grouped faders is operated. When the user operates slave faders, the operation is revoked, and only the indicator corresponding to the master fader is lighted or blinked.
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