Adobe 22011292 User Guide - Page 164

150 CHAPTER 8 Effects Menu - Edit View Graphic Equalizer With the Graphic Equalizer, you can boost or cut the signal at particular frequency bands, and have a visual representation of the overall EQ curve. Unlike the Parametric Equalizer, the Graphic Equalizer uses preset frequency band controls for quick and easy frequency equalization. Graphic Equalizer dialog (30 Bands tab) Adobe Audition's Graphic Equalizer is implemented as an FIR (Finite Impulse Response) filter, which maintains phase errors over the response curve, unlike IIR filters which can have phase error (often audible as a ringing quality). This means that to gain higher accuracy in the lower frequencies, a higher accuracy (the size of the FIR filter) must be used. The bands can be spaced at either one octave, one-half octave, or one-third octave intervals, with the appropriate Q setting such that if adjacent bands are boosted, the result has no drop outs at intermediate frequencies. Bands Tabs The Graphic Equalizer bands are spaced at either one octave (10 band), one-half octave (20 band), or onethird octave (30 band) intervals. Select the appropriate tab to access the number of EQ bands you need. As you might expect, the 10-bands mode offers more general equalizing, while choosing 20 or 30 bands will let you zoom in on specific frequency ranges more precisely. Other than the number of bands, the controls in each tabbed Graphic Equalizer window are identical. Reset All to Zero This button sets all sliders to 0dB so there's no equalization. Band Use this drop-down list to select the band that's to be modified with the value entered in the Gain box to the right.