Adobe 22011292 User Guide - Page 174

160 CHAPTER 8 Effects Menu - Edit View Cutoff This parameter defines the frequency serving as a border between passed and rejected frequencies. It is at this point that the filter will switch from passing to attenuating or vice versa. In filters requiring a range (Band Pass and Band Stop), this serves as the lower frequency, while High Cutoff defines the high frequency border. High Cutoff In filters requiring a range (Band Pass and Band Stop), this serves as the higher frequency, while Cutoff defines the lower frequency border. Order The higher the order, the more precise the filter (with steeper slopes at the cutoff points, etc.). However, very high orders can also have high levels of phase distortion. Transition Bandwidth Some filter types allow the specification of the width of the transition band. (Lower values have steeper slopes.) If you choose a transition bandwidth, the Order will be filled in automatically, and vice-versa. In filters requiring a range (Band Pass and Band Stop), this serves as the lower frequency transition, while High Width defines the higher frequency transition. High Width In filters requiring a range (Band Pass and Band Stop), this serves as the higher frequency transition, while Transition Bandwidth defines the lower frequency transition. Pass Ripple/Actual Ripple Some high-order filter types give you the ability to choose the maximum allowable amount of ripple. Ripple is the effect of unwanted boosting and cutting of frequencies near the cutoff point. Stop Attn The Stop Band Attenuation control determines how much gain reduction is to be used when removing frequencies. Master Gain After the filter settings have been adjusted, the overall volume level might be too loud or too soft. You can compensate for this by entering an overall master gain (measured in dB) for both the left and the right channels to be applied to the resulting audio. Presets Adobe Audition comes with several Scientific Filter presets. More information on presets can be found in the "Looking at the Work Area" chapter. Preview Press the Preview button to audition the current Scientific Filter setting before you apply it to the waveform. The selection is looped until you press the Stop button. Since Adobe Audition's Previews are dynamic, this gives you the opportunity to make and hear processing adjustments as the selection is continuously played. Noise Reduction The effects in the Noise Reduction menu can be used to reduce background noise and general broadband noise without having an adverse effect on the overall quality of the originally-recorded signal.