10.6

293Logic Pro Effects
Filter envelope parameters
• Init Freq field: Set the initial cutoff frequency of the filter envelope.
• Attack field: Determine the time required to reach the Break Level.
• Break Level field: Set the maximum filter cutoff frequency reached by the envelope.
This setting also acts as the separation point between the attack and decay phases of
the overall filter envelope. In other words, when the set level is reached after the attack
phase, the decay phase begins. You can create interesting filter sweeps by setting the
Break Level value lower than the Init Level parameter value.
• Decay field: Determine the time required after the Break Level point to reach the End
Freq value.
• End Freq field: Set the cutoff frequency at the end of the filter envelope decay phase.
Logic Pro Space Designer density envelope
The density envelope controls the density (the average number of reflections) of the
synthesized impulse response over time. You can adjust the density envelope numerically
in the parameter bar, and you can graphically edit the Init Level, Ramp Time, and End Level
parameters using the techniques described in
Edit Space Designer envelopes in Logic Pro.
Note:
The density envelope is available only in Synthesized IR mode.
Density envelope parameters
• Init Density field: Set the initial density (the average number of reflections in a given
period of time) of the reverb. Low density levels result in audible reflection patterns
and discreet echoes.
• Ramp Time field: Adjust the time between the Initial and End Density levels.
• End Density field: Set the density of the reverb tail. An End Density value that’s too low
can result in a grainy sounding reverb tail. The stereo spectrum may also be affected by
lower values.
• Reflection Shape field: Determine the steepness (shape) of early reflection clusters as
they bounce off the walls, ceiling, and furnishings of the virtual space.
Low values result in clusters with a sharp contour. High values result in an exponential
slope and a smoother sound. Reflection Shape is useful when recreating rooms
constructed of different materials. When used with suitable envelope, density, and
early reflection settings, you can create rooms of almost any shape and material.