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Chapter 13 Space Designer convolution reverb 241
Turn on IR Sample mode
In IR Sample mode, Space Designer loads and uses an impulse response recording of an acoustic
environment. This is convolved with the incoming audio signal to place it in the acoustic space
provided by the impulse response.
1 Click the IR Sample button in the circular area to the left of the main display.
2 Select an impulse response le from any folder.
Note: If you have already loaded an impulse response le, clicking the IR Sample button switches
the mode from Synthesized IR to IR Sample mode.
Manage the loaded impulse response le
m Click the down arrow next to the IR Sample button to open a pop-up menu containing the
following commands:
•
Load IR: Loads an impulse response sample without changing the envelopes.
•
Load IR & Init: Loads an impulse response sample and initializes the envelopes.
•
Show in Finder: Opens a Finder window that shows the location of the currently loaded
impulse response le.
All impulse responses that ship with Logic Pro are installed in the /Library/Audio/Impulse
Responses/Apple folder. Deconvolution les have an .sdir le extension.
Any mono, stereo, AIFF, SDII, or WAV le can be used as an impulse response. In addition,
surround formats up to 7.1, discreet audio les, and B-format audio les that consist of a single
surround impulse response can also be used.
Use Synthesized IR mode
In Synthesized IR mode, Space Designer generates a synthesized impulse response based on the
values of the Length, envelope, Filter, EQ, and Spread parameters.
Note: You can switch between a loaded impulse response sample and a synthesized impulse
response without losing the settings of the other.
m Click the Synthesized IR button in the Impulse Response Parameters section.
Repeated clicks of the active Synthesized IR button will randomly generate new impulse
responses with slightly dierent reection patterns. The current impulse response state
(including parameter and other values that represent the reection patterns and characteristics
of the synthetic impulse response) is saved with the setting le.
Note: Clicking the Synthesized IR button while you are in IR Sample mode switches you back to
the synthesized impulse response stored with the setting.