Apple Logic Space Designer impulse response data
File type: Audio and sound file
An .sdir file contains impulse response data for Apple's Space Designer audio effect.
It belongs to the Space Designer component of Apple Logic Studio and Apple Logic Pro.
File type category:
Audio and sound file
Date updated: October 5, 2026
Space Designer is a convolution reverb included with Apple's music production software. It uses impulse responses to reproduce the acoustic characteristics of spaces, equipment, or other reverberation sources.
The .sdir file extension identifies impulse response data used by Space Designer. The file is part of the software's impulse response library rather than a general-purpose audio recording.
Apple Logic Studio is an obsolete product that was replaced by Apple Logic Pro. Logic Studio was made for Mac OS X, while Logic Pro runs on Apple's macOS platform.
Open the file through Space Designer in Apple Logic Pro on macOS. Use Space Designer's impulse response browser or loading controls to select it; an .sdir file is not normally opened as a standalone document.
Older installations may use Apple Logic Studio on Mac OS X. If the file is from an older Logic library, keep it in the location expected by the software so Space Designer can find it.
The data is intended to remain in the Space Designer library and be used by Logic.
If the impulse response must be moved to another format or application, use the original impulse-response audio source and import or recreate it in the target software. Logic's Space Designer can continue to use the .sdir data directly.
Software applications that can open sdir files:
Apple macOS / Mac OS X
Software applications that can edit sdir files:
Apple macOS / Mac OS X
Software capable of saving sdir files:
Apple macOS / Mac OS X
Apps designed for playing sdir files:
Apple macOS / Mac OS X
Software apps that create sdir files:
Apple macOS / Mac OS X
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