It is simpler and provides the ability for most common designs. The first is using designParamEQ and the second is using fdesign.parameq. This example discusses two separate approaches to parametric equalizer design. In addition, the designs special-case to traditional second-order parametric equalizers if the order of the filter is set to two. Such high-order designs provide much more control over the shape of each filter. The DSP System Toolbox™ provides the capability to design high-order IIR parametric equalizers. These filters have the drawback that because of their low order, they can present relatively large ripple or transition regions and may overlap with each other when several of them are connected in cascade. Typically, parametric equalizers are designed as second-order IIR filters. In contrast, graphic equalizers only allow for the adjustment of the gain of each filter. Parametric equalizers provide capabilities beyond those of graphic equalizers by allowing the adjustment of gain, center frequency, and bandwidth of each filter. Parametric equalizers are digital filters used in audio for adjusting the frequency content of a sound signal. This example shows how to design parametric equalizer filters.
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