| 摘要 |
PROBLEM TO BE SOLVED: To prevent malfunction of an automatic function even when audio information becomes weak or in a soundless state in a disk device having an automatic function. SOLUTION: This device recording device for recording audio information externally inputted in a disk type recording medium has an automatic function for synchronized recording based on audio information. Further, the disk recording device is provided with a level detecting means 2 for detecting a level of audio information, plural filters 3-6 different in frequency, filter selecting means 7-8 for selecting one filter out of filters 3-6 in accordance with an output of the level detecting means 2. Thereby, judgment of the automatic function in an input detecting means 9 is performed based on audio information passing through a filter selected by filter selecting means 7, 8.
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