Apple Impulse Response Utility project file
File type: Audio and sound file
A .sdirproj file is a project file used by Apple Impulse Response Utility to store project data for an impulse response project.
The file belongs to Apple's audio production software and is associated with Apple Logic Studio, of which Impulse Response Utility is a part.
File type category:
Audio and sound file
Date updated: November 4, 2026
The .sdirproj file extension identifies an Apple Impulse Response Utility project file. Apple Impulse Response Utility is an audio tool that is part of the Apple Logic Studio suite and is designed for creating impulse responses for use in audio applications.
An .sdirproj file is a Mac OS X package file. It acts as a container for the project and all files associated with it, rather than being a single audio recording.
The format is associated with Apple Impulse Response Utility software for Apple macOS and Mac OS X. It is not intended as a general-purpose audio interchange format.
Open the .sdirproj file with Apple Impulse Response Utility on Apple macOS or Mac OS X. In Finder, the package may appear as a single project file; opening it with the associated application lets the utility read its project data and contained files.
Apple Logic Studio is also associated with this file type, although the project is intended for Impulse Response Utility.
An .sdirproj file is a project package, so it cannot usually be converted directly with a general-purpose audio converter. Open it in Apple Impulse Response Utility and use the application's available export or rendering function to create an audio or impulse-response file.
Software applications that can open SDIRproj files:
Apple macOS / Mac OS X
Apple Impulse Response Utility
Software applications that can edit SDIRproj files:
Apple macOS / Mac OS X
Apple Impulse Response Utility
Software capable of saving SDIRproj files:
Apple macOS / Mac OS X
Apple Impulse Response Utility
Software apps that create SDIRproj files:
Apple macOS / Mac OS X
Apple Impulse Response Utility
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