10.6

327Logic Pro Effects
• High Cut knob and field: Filter frequencies above the set value from the reverb signal.
Uneven or absorbent surfaces—wallpaper, wood paneling, carpets, and so on, tend to
reflect lower frequencies better than higher frequencies. The High Cut filter mimics
this effect. If you set the High Cut filter to its maximum value, the reverb sounds like
it is reflecting off stone or glass.
• Density knob and field: Control the density of the diffuse reverb tail. Ordinarily you want
the signal to be as dense as possible. In rare instances, however, a high Density value
can color the sound, which you can fix by reducing the Density knob value. Conversely,
if you select a Density value that is too low, the reverb tail sounds grainy.
• Reverb Time knob and field: Set the time it takes for the reverb level to drop by 60 dB—
often indicated as RT60. Most natural rooms have a reverb time somewhere in the
range of 1 to 3 seconds. This time is reduced by absorbent surfaces, such as carpet
and curtains, and soft or dense furnishings, such as sofas, armchairs, cupboards, and
tables. Large empty halls or churches have reverb times of up to 8 seconds, with some
cavernous or cathedral-like venues extending beyond that.
• Diffusion slider and field (Extended Parameters area): Set the diffusion of the reverb
tail. High Diffusion values represent a regular density, with few alterations in level,
times, and panorama position over the course of the diffuse reverb signal. Low
Diffusion values result in the reflection density becoming irregular and grainy.
This also affects the stereo spectrum. As with Density, find the best balance
for the signal.
Logic Pro Legacy Grooveshifter
Grooveshifter allows you to rhythmically vary audio recordings, imparting a swing feel
to the input signal. Imagine a guitar solo played in straight eighth or sixteenth notes.
Grooveshifter can make this straightforward solo swing.
Grooveshifter automatically follows all changes to the project tempo, which it uses as the
reference tempo.
Note: Grooveshifter relies on perfect matching of the project tempo with the tempo of the
treated recording. Any tempo variations deliver less precise results.