| 摘要 |
PURPOSE:To secure the easy confirmation of the reproduction information for the learner by lighting up the lamp corresponding to the print information part which is explained currently. CONSTITUTION:Aural information A which gives explanation to the information printed on the surface of the record sheet, chime tone B which informs the partition of each step, and control signal C are arranged on the aural track. Then tone B is reproduced from sheet S via head 2, and thus detector 10 delivers the pulse. Thus mono-multi 11 is triggered with gate 12 closed, and signal C is not delivered. Signal C is detected by detector 13, and the clocks are generated and counted 15. At the same time, the clock is applied to serial-parallel converter 14, and the data of that time is read sequentially. The the output of converter 14 is introduced to driver 17 at the end of reproduction, and lamp Li is lit up corresponding to the data. |
