Huron & SNAP Documentation

Calculating the Equalisation Curve
↓ To toggle the automatic
calculation of responses
↓ To manually calculate and
download the equalisation curve
Bypass the Equalisation Curve
↓ To bypass the equalisation
curve
Setting the EQ Filter Length
THE EQUALISATION TOOLS
After an adjustment has been made to sliders on the EQ canvass
the response is automatically calculated. If calculations take a
long time, this auto-calculate feature may be turned off. With
this feature turned off the effects of any adjustments are not
calculated and downloaded into the hardware until the calculate
command is given.
Select Auto Calculate from the Filter menu.
• Click .
— or —
Select Calculate Now from the Filter menu.
— or —
Press F9.
The curve will be calculated and downloaded.
In order to compare untreated signals with equalised signals it is
possible to switch sound so that it bypasses the equalisation
curve.
• Click .
This will load a flat filter in to the system, and therefore bypass
any slider configuration for that canvass.
Lake EQ operates using convolution. This involves the
construction of what is known as a filter from the positions of
all the sliders and downloading this filter to DSP boards. The
filter represents the equalisation curve. The size of the filter
passed to the DSP boards determines how accurately the
equalisation curve can be modelled by the hardware. The larger
the filter (ie. the more samples there are), the more accurate the
resolution of the filtering that the system performs, or the finer
that EQ adjustments can be made.
By selecting the largest filter size, Lake EQ will always be as
accurate as possible. Unfortunately there is a trade off: Time.
The larger the filter, the longer it takes to construct and the
longer it takes to download the filter to the DSP cards.
HURON TECHNICAL MANUAL PAGE 260