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120 Chapter 10 Convolution Reverb: Space Designer
IR Sample
When the IR Sample button is initially clicked, an operating system File Selector dialog
will be launched, allowing you to select the desired Impulse Response file from a folder
on your hard disks or CD.
If you have already loaded an IR file, this button is simply used to switch back from
Synthesized IR to IR Sample mode. To change the Impulse Response click the downward
pointing arrow to the right of the button.
The default IR folder is found in the following path: Local: /Library/Application Support/
Apple/Impulse Responses
Simply browse to the desired file, and click OK. Any mono, stereo or split stereo AIFF,
SDII or WAV file can be used.
The downwards pointing arrow to the right of the button accesses the following menu
functions:
• Load IR—loads an IR sample without changing the envelopes.
• Load IR & Init—loads an IR sample and initializes the envelopes.
The name of the loaded IR file and its length are displayed in the Envelope window.
Synthesized IR
Clicking on this button will activate the Impulse Response synthesizer. A synthesized
IR—determined by the values of the Length, Envelope, Filter, and Spread parameters—is
generated.
Subsequent button pushes will randomly generate new IRs with slightly different
reflection patterns. The current IR state will always be saved with a setting, allowing for
an accurate reproduction of the reverberation sound when next loaded.
You may freely switch between a loaded IR sample and a synthesized IR without losing
the settings of the other.