| 摘要 |
An instruction stand comprising an operational keyboard which provides connection of the instructor's stand with students' stands, loudspeakers, video-tape recorder and other audio-visual equipment by means of electronic commutation circuits enabling stereophonic signals mixing or tone quality adjustment, which circuits are led out via a commutation bus bar with connecting socks for students' stands and audio-visual equipment, characterised in that it is made as a free-standing control desk (1), on which, besides a known keyboard set, there are situated on the front panel of the control desk (1) an operational keyboard for remote control of tape recorders (3) and potentiometers for mixing signals of the tape recorders (3), whose connecting socks are led out to the aforementioned commutation bus bar (11), whilst to the commutation bus bar there is connected at least one flexible cable sleeve (13) along which there are spaced connecting socks (14) for earphone-microphone stands (8) corresponding to the socks (12) on the bus bar.<IMAGE>
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