User guide

IR Equaliser Tabs
The associated IR EQ filter tabs for each impulse response provide a 5-band twice-oversampled
paragraphic EQ which is applied to the impulse response(s) in IR1 and IR2. The frequency and gain of
each EQ band can be modulated in time independently to apply swept EQ effects to the impulse
responses. When the final frequency and final gain parameters are set fully left no modulation is
applied, otherwise the EQ settings applied to the static IR will be modulated linearly between the
start to end times chosen. No modulation is applied if the end time is less than the start time.
Modulation of the EQ can be useful for applying subtle low pass filtering where the frequency cut-off
reduces over time to mimic the natural high frequency roll-off in real spaces, or for more creative
purposes. Frequency modulation can be set to a linear or exponential time base using the button
between the Start and End titles. Moving filters often sound more natural with an exponential time
base as lower frequencies are more pronounced. Gain modulation can be set to linear or half-cosine.
The view control sets the position of the EQ display in time. When set fully left it represents the
initial state of the EQ and fully right shows the final state of the EQ. The output of the IR EQ is not
affected by the view control, it is provided purely for user convenience to help visualise the effect
the modulation has over time.
Each frequency band has a full controls tab and there is also a consolidated controls tab where the
start position of bands 1-5 can be controlled in a single location for a more traditional EQ
manipulation view.
The consolidated view contains controls marked with a note button that can be used to set the
frequency to a range of presets from A
0
to G
#
8
providing a very musical approach to equalisation.
The EQ graph handles can be dragged to change gain and frequency, and right clicked to toggle them
to enabled or disabled. Holding the keyboard ALT key and clicking a handle toggles the EQ type
(peak, low pass, etc).
The sheen control can be used to add high-frequency presence absent from the original IR. This is
achieved by mixing in an additional IR with an approximately flat frequency response whose