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Huron & SNAP Documentation

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Loading EQ Canvasses<br />

↓ To load a previously saved EQ<br />

canvass<br />

Clicking and Dropping Slider Widgets<br />

Band Pass<br />

Low Shelf<br />

THE EQUALISATION TOOLS<br />

• Select File and Open.<br />

Supplied with the software are two example canvasses,<br />

‘10band.eq’ and ‘30band.eq’. These two presets allow you to<br />

immediately use the Lake EQ. They are installed in the<br />

<strong>Huron</strong>32\EQ directory.<br />

Equalisation is performed by placing one or more slider widgets<br />

on the canvass in such a way that the desired equalisation effect<br />

is achieved. The vertical and horizontal placement of each<br />

widget on the canvass is important as their positions indicate the<br />

dB (vertical displacement) and frequency in Hertz (Horizontal<br />

displacement).<br />

There are three different types of slider widgets:<br />

A bandpass slider has a gain of 0db for all frequencies outside<br />

the bandwidth of the slider. Within the bandwidth of the slider<br />

the frequency response is a raised cosine. In short the band pass<br />

slider can be used as a traditional parametric equalizer.<br />

Figure 82 – Band Pass Equalisation<br />

This band pass slider is cutting the frequency response from<br />

about 600Hz to 1700 Hz, with a maximum cut of -15dB at<br />

about 1000Hz.<br />

A low shelf slider has a maximum gain for all frequencies less<br />

than the lower sideband frequency of the slider. Within the<br />

bandwidth of the slider the frequency response is a raised sine.<br />

The gain is 0db for all frequencies above the upper sideband<br />

frequency.<br />

HURON TECHNICAL MANUAL PAGE 257

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