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Huron & SNAP Documentation

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High Shelf<br />

Tip: All the sliders can also be used to<br />

boost the signal over the frequency in<br />

which they operate.<br />

↓ To add a Slider to the canvass<br />

Figure 83 – Low Shelf Equalisation<br />

THE EQUALISATION TOOLS<br />

This low shelf slider starts cutting the frequency response at<br />

about 250Hz, hitting a low shelf point of about -14 dB at about<br />

120Hz. From this point the maximum cut is applied all the way<br />

to the lowest frequency.<br />

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

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

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

sine. The gain is 0db for all frequencies less than the lower<br />

sideband frequency.<br />

Figure 84 – High Shelf Equalisation<br />

This high shelf slider is performing the reverse of the low pass<br />

slider. The frequency response starts being cut from about<br />

1100Hz and drops to a maximum of about -11dB at about<br />

3000Hz. From this point the maximum cut is applied all the<br />

way to the highest frequency.<br />

1. Selecting the Slider widget from the toolbar.<br />

— or —<br />

Selecting a new slider from the filters menu on the menu<br />

bar.<br />

HURON TECHNICAL MANUAL PAGE 258

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