Operation Manual
CHAPTER 19. LIVE AUDIO EFFECT REFERENCE 250
If you have ever used a good DJ mixer you will know what this is: An EQ that allows you to
adjust the level of low, mid and high frequencies independently.
Each band can be adjusted from -innite dB to +6 dB using the gain controls. This means
that you can completely remove, for example, the bass drum or bassline of a track, while
leaving the other frequencies untouched.
You can also turn on or off each band using the On/Off buttons located under the gain
controls. These buttons are especially handy if assigned to computer keys.
EQ Three gives you visual conrmation of the presence of a signal in each frequency band
using three green LEDs. Even if a band is turned off, you can tell if there is something going
on in it. The internal threshold for the LEDs is set to -24 dB.
The frequency range of each band is dened via two crossover controls: FreqLo and FreqHi.
If FreqLo is set to 500 Hz and FreqHi to 2000 Hz, then the low band goes from 0 Hz to 500
Hz, the mid band from 500 Hz to 2000 Hz and the high band from 2000 Hz up to what ever
your soundcard or sample rate supports.
A very important control is the 24 dB/48 dB switch. It denes how sharp the lters are
cutting the signal at the crossover frequency. The higher setting results in more drastic
ltering, but needs more CPU.
Note: The lters in this device are optimized to sound more like a good, powerful analog
lter cascade than a clean digital lter. The 48 dB Mode especially does not provide a
perfect linear transfer quality, resulting in a slight coloration of the input signal even if all
controls are set to 0.00 dB. This is typical behavior for this kind of lter, and is part of EQ
Three's unique sound. If you need a more linear behavior choose 24 dB Mode or use the
EQ Eight.