Adobe 22011292 User Guide - Page 169

ADOBE AUDITION 155 User Guide Parametric Equalizer Parametric equalizers are used for fine editing of frequencies within a sound. They differ from equalizers that offer a specific number of frequencies and Q bandwidths (which determines how many overall frequencies will be affected by a single, selected frequency control) in that they give you continuous control over the frequency, Q, and gain settings. Parametric Equalizer dialog For example, with the parametric equalizer, you can boost a broad range of frequencies that are centered around 1000 Hertz (1kHz), or you can boost the low frequencies while simultaneously inserting a 60 Hz notch filter. Adobe Audition's Parametric Equalizer uses IIR filters (second order), which are very fast and can give very precise resolution, even at the lower frequencies. For instance, it's easy to boost just the bass at 40Hz to 45Hz. Graph The graph depicts frequency along the x-axis (left and right) and amplitude along the y-axis (up and down), with the curve representing the amplitude change at specific frequencies. Frequencies in the graph range from lowest to highest in a logarithmic fashion (evenly spaced by octaves). Low Shelf The slider directly to the left of the graph determines the Low Shelf amplitude in dB. To increase or decrease the lows (bass) at any time, just adjust the slider, or enter a dB level in the box at the bottom of the slider.