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.SFK File Extension

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File TypeSound Forge Pro Audio Peak File

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Rare Uncommon Average Common Very Common
CategoryAudio Files


File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.


Stores the waveform image of an audio wave (.WAV) file saved by Sound Forge Pro, Sony Vegas, or a Sony digital media device; created automatically when an audio file is opened with Sound Forge Pro or Sony Vegas; stored in the same folder with the same name as the audio file, but with ".sfk" added after the original extension.

More Information

SFK files are used by Sound Forge Pro and Sony Vegas to visually represent audio data, but are not meant to be opened or edited manually. SFK files do not contain any actual audio data.

If the related audio file is modified in a different program, you can regenerate the peak file by selecting "Rebuild Peak Data" from the Special menu in Sound Forge.

Sound Forge Pro was previously developed by Sonic Foundry, which was acquired by Sony in May, 2003.

Programs that open SFK files
Sony Sound Forge Pro 11
Sony ACID Pro 7
Sony Vegas Pro 13
Updated 10/7/2015