| 摘要 |
PURPOSE:To obtain a normal recording and reproducing characteristic by providing a sampling removing filter thereby controlling the compression and expansion characteristic of a noise reducing circuit by the level of an audio signal without being influenced by a sampling frequency signal from a digital audio equipment. CONSTITUTION:A signal inputted to an inut terminal 1 is inputted to a recording system noise reducing circuit 10 through a recording system sampling frequency removing filter 12. Output signals of the circuit 10 are recorded and reproduced by a tape head system 2, and reproduced signals are inputted to a reproducing system noise reducing circuit 11 through a reproducing system sampling frequency removing filter 13. Output signals of the circuit 11 are outputted from an output terminal 3. By providing the recording system sampling frequency signal removing filter 12 in the front stage of the circuit 10 and providing the reproducing system frequency signal removing filter 13 in the front stage of the circuit 11, input signals can be recorded and reproduced without subjected to the interference of sampling frequency signals, and normal noise reducing effect can be obtained. |
