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Shelving equalizer definition9/2/2023 ![]() All that means is that we should focus on the areas where there is too much of a certain frequency range and bring that down instead of looking for frequencies that need to be boosted. It's for these reasons that audio pros universally recommend subtractive EQ'ing whenever possible. More importantly, if you set your gain to have 0 dB of signal and you increase your high-mid frequencies by 6 dB, you've added 6 dB of artificial sound to the 0 dB of signal. Now if we've already set our gain aggressively according to what we learned in part one of our Mixing Like a Pro series, then we should know that by increasing the gain of a frequency range we could potentially cause clipping because of those boosts. It's important to know that when you increase or decrease EQ gain, you're increasing and decreasing the actual gain (loudness level) of those specific frequencies. You might be thinking "that's great, but how do I know which frequencies to select to make adjustments for what I am hearing from the stage?" We'll cover that in the next article. High frequencies like 5 kHz and 10 kHs describe higher tones. Low frequencies like 40 Hz and 100 Hz describe lower tones. EQ frequency controls use these numbers to describe the tonal range of the audio spectrum and allow us to find specific frequencies and make adjustments to them. The ones we hear in sound systems are measured in Hz (Hertz) and kHz (kiloHertz). Here are a couple of vital concepts to grasp: Frequencies EQs are circuits that can select various groups of frequencies in an audio signal and allow us to increase or decrease the gain of these frequency groups to affect the tone characteristics of our sound. In order for us to really understand EQ, we need to start at the beginning and describe what EQ (Equalization) is, what the various types of EQs in use today are and describe the controls you are likely to find on your console. No matter where we apply EQ, the basic principles are the same and that's what we will be looking at. Of course, EQ can be applied to specific input channels, to groups and AUX mixes and to the main signal that feeds your main speakers. In addition to the EQ that appears on mixing consoles, there are outboard EQ units as well as software EQ plug-ins available to us. ![]() We'll start with Understanding EQM (this page), then move on to How To Make EQ Work For You and finally EQ Helpful Hints. Since this is a more complex topic, let's break it into three sub-topics. Part Three: Understanding EQĪs we continue our quest of Mixing Like a Pro, we're going to tackle one of the more complicated aspects of sound – EQ. ![]() Library Cases & Media Library Media Cases ![]()
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