User Guide

Chapter 12 Convolution Reverb: Space Designer 185
Filter Envelope Parameters
The filter envelope lets you control the filter’s cutoff frequency over time. All of the filter
envelope’s parameters can be adjusted either numerically in the parameter area or
graphically in the main display using the techniques discussed in “Setting Envelope
Parameters” on page 182.
The parameters for the Filter Envelope are as follows:
 Init Level: Sets the initial cutoff frequency of the filter envelope.
 Attack Time: Determines the time required to reach the Break Level (see below)
value.
 Break Level: Sets the maximum filter cutoff frequency the envelope reaches. It also
acts as the break point between the attack and decay phases of the overall filter
envelope. In other words, when this level has been reached after the attack phase,
the decay phase will begin. You can create interesting filter sweeps by setting the
Break Level to a value lower than that of the Init Level.
 Decay Time: Determines the time required (after the Break Level point) to reach the
End Level value.
 End Level: Sets the filter end cutoff frequency.
Controls the Attack Time
endpoint (and Decay
Time startpoint) and
Break Level parameters
simultaneously.
Controls the
Decay endpoint and
End Level parameters
simultaneously.