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#Define equalizer software
NOTE: Many software and hardware EQs have a "bypass" setting. A shelving EQ is similar to a low or high-pass filter, but it can also boost a low or high-end frequency. These are useful for removing too much bass or treble from an audio signal. Filters, such as low-pass and high-pass filters, roll off low and high frequencies, respectively. Other types of equalizers include filters and shelving EQs. Therefore, most audio professionals prefer to work with parametric equalizers. Fully-parametric EQs have a less-intuitive interface, but they provide more control over each frequency adjustment. Many consumer audio programs include graphic equalizers because they are simple to use. For example, a "smiley-face" EQ, which boosts the lows and highs and cuts the mids, is easy to recognize. The visual nature of graphic EQs makes them easy to use and understand. A wide Q targets a broad frequency range, such as a string section. For example, a narrow Q targets a small frequency range, such as a snare drum hit. The "Q" setting of a parametric EQ allows you to control how quickly the adjustment rolls off. Most graphic equalizers automatically adjust the frequencies around each slider, which "rolls off" the boost or cut to the surrounding frequencies. A fully-parametric EQ enables you to modify the frequency, gain, and "Q" (or width) of each setting. A semi-parametric EQ allows you to select the frequency and gain of each adjustment. Parametric EqualizerĪ parametric EQ uses knobs instead of sliders. Some EQs include a "preamp" slider that can boost the input levels, which raises the overall amplitude of the output signal. Therefore, it is usually best to decrease the levels of individual frequencies and increase the overall volume. Increasing the output of a specific frequency too much may cause distortion (or "clipping" in a digital audio signal). Some EQs may only provide an output range of +/- 6 dB, while others allow you to cut or boost the level by more than 20 dB. A 7-band EQ may have sliders for specific frequencies, such as 50 Hz, 120 Hz, 300 Hz, 800 Hz, 2 kHz, 5 kHz, and 12 kHz. For example, a simple 3-band EQ may have "bass," "mid," and "treble," sliders. The more bands, the more granular the control. A typical graphic EQ may have anywhere from 3 to 31 bands. It includes sliders that allow you to cut or boost specific frequencies. The most common and well-recognized equalizer is the graphic EQ. Several types of equalizers exist, but the most common are graphic and parametric. A software EQ is controlled with a mouse or keyboard and processes digital audio through a computer. A hardware EQ has physical knobs or sliders and processes analog audio signals using internal circuitry. For example, an EQ enables you to amplify low "bass" frequencies while not affecting sounds in the mid or high "treble" range.īoth hardware and software equalizers are available. It allows you to cut or boost the levels of specific frequency ranges, providing more granular control of the sound volume. An equalizer or "EQ" is a sound engineering tool that adjusts the output of different frequencies.
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