| 摘要 |
<p>A frequency response display for use with a graphic equalizer which receives an audio signal includes first and second band-pass filters (5a,5b) which receive the audio signal and pass different pass bands, first and second variable resistors (7a, 7b) which have control knobs (1a, etc.) illumination devices (2a, etc.) mounted in the knobs (1a, etc.) first and second rectifier circuits (8a, 8b) connected to the outputs of the band-pass filters (5a, 5b), and first and second drive circuits (9a, 9b) connected to the outputs of the first and second rectifier circuits (8a, 8b) and to the illumination devices (2a, etc.), and an oscillator (11) connected to the illumination devices (2a, etc.) so as to cause them to flash under certain conditions. </p> |
