| 摘要 |
PURPOSE:To synchronize plural electronic apparatuses, by connecting an input terminal of an open collector amplifier to preparation completion terminals of plural electronic apparatuses, respectively, connecting in common an output terminal of the open collector amplifier, and supplying an output to a start terminal of each electronic apparatus. CONSTITUTION:At the time point of start of an automatic musical performance, each preparation completion terminal T1 of electronic musical instruments 1, 1- is in L level, and accordingly, a common connecting point P is also in an L level, and a signal of an L level is supplied to each start terminal T2. When an automatic musical performance start button of each electronic musical instrument 1, 1- is pushed, a signal of an H level is outputted from each terminal T1 at the point of time when the preparations are complted, and when the H level signal is outputted from the terminal T1 of all the electronic musical instruments 1, the common connecting point P rises to an H level, this H level signal is supplied as a start signal to the terminal T2 through buffer amplifiers 5, 5-, read-out of a musical performance data in each electronic musical instrument 1, 1- is started, and an automatic musical performance is executed. |
