| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a filter, which adjusts at least a phase frequency characteristic of frequency characteristics (amplitude frequency characteristic and phase frequency characteristic) of an audio signal, capable of achieving adjustment of tone quality suited to various applications. <P>SOLUTION: The filter is configured so that an own phase frequency characteristic and an own amplitude frequency characteristic can be independently changed, a desired phase frequency characteristic curve and a desired amplitude frequency characteristic curve are displayed on an identical screen of a display unit, the own phase frequency characteristic is changed independently of the own amplitude frequency characteristic on the basis of the phase frequency characteristic expressed with the desired phase frequency characteristic curve, and so that the amplitude frequency characteristic of an audio signal is changed independently of the phase frequency characteristic on the basis of the amplitude frequency characteristic expressed with the desired amplitude frequency characteristic curve. <P>COPYRIGHT: (C)2013,JPO&INPIT |
