Extract text from Acoustic impulse files (SFI)
To convert SFI Impulse files to another format, you need Sound Forge or other Audio software.
To convert other file formats to the "Impulse Response File" file type, you need software like Sound Forge or a similar tool.
The .sfi file extension is most commonly a Sonic Foundry Acoustic Mirror Impulse file. These files store acoustic impulse responses - the mathematical "fingerprint" of a physical acoustic space, like a concert hall, bathroom, or cathedral. This spatial data is used by convolution reverb plugins, originally the Acoustic Mirror plugin in Sound Forge, to realistically simulate acoustic environments on dry audio tracks. Alternatively, it may be a Photo Booth single image, a Powel Gemini geodata exchange file, or a SafeFolder Encrypted File.
The main disadvantage of the .SFI audio format is that it is proprietary and obsolete. Rooted in early 2000s Sonic Foundry software, it is not supported by most modern Digital Audio Workstations (DAWs) or standard convolution reverb plugins. They require standard audio formats to read impulse responses. Similarly, the geodata and encrypted variants are entirely locked into their respective legacy ecosystems, making them useless outside of their native applications.
To use these legacy impulses today, users must convert .SFI audio files to standard WAV files. For the image variants, conversion to JPG or PNG is necessary for web compatibility.
Because .SFI is often a closed, proprietary format (especially the encrypted and GIS data types), standard online converters often fail to process it. Just drag and drop your file onto convert.guru to identify the format, view it, and convert it when possible. Even if it is a heavily locked spatial file, our analysis detects supported underlying RIFF structures, so viewing or conversion may still be possible.
Convert.Guru analyzes your SFI file, detects the exact format, and lets you read the text inside.
Users also converted SKR, PTM and VTU files.
If you want to convert SFI file to , you can use Sound Forge or similar software from the "Acoustic Impulse Response Data" category. In the File menu, look for Save As… or Export….
To convert files to SFI, try Sound Forge or another comparable tool in the "Acoustic Impulse Response Data" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our SFI converter.