| 摘要 |
PURPOSE:To produce sound, store and reproduce or transmit it externally, by connecting an acoustic coupler or an acoustic cassette to a converter which converts a digital input into sound via a selector switch. CONSTITUTION:A digital signal is input from a signal line l1, in an FSK demodulator 1, which converts a digital input into sound, and it is output from a line l4, and analog signal is output from a signal line l2 and input from l3. The signal lines l2, l3 are connected to selector switches S1, S2, and when they are connected to an acoustic coupler 2, the sound amplified at an amplifier 1 energize a speaker S, and a signal caught at a microphone M passes through a filter FLT and only desired frequencies are digitized and output from the signal line l4. Further, when they are connected to an acoustic cassette 3, they are written on a read/write head RWHD or digitized via a playback amplifier RAMP and output from the signal line l4. |
