| 摘要 |
PROBLEM TO BE SOLVED: To enable the accurate spectrum analyzer display of audio signals in a plurality of channels, without increasing the circuit scale in a level indicator. SOLUTION: Audio signals to which a BPF group 13 are inputted through an input selector 12 are divided in a plurality of frequency bands, a DET group 14 charges the divided signals by charging capacitors, and an MPU 17 AD- converts and stores the charged voltages as intake indication data, forcedly discharges the voltages charged in the charging capacitors of the DET group 14 when the channels of the audio signal inputted through the input selector 12 are switched over, and actuates display elements 18 to provide the spectrum analyzer display or level meter indication in each channel, based on display data when the display data are obtd. at all channels.
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