PK files exist as 2 different types. Please find information about each of them below.
Type 1: Audition Peak File
Peak files contain information about how audio files are displayed in Audition. Saving peak data speeds up loading files next time. By default, Audition saves peak files for wav files only. Other file...
Peak files contain information about how audio files are displayed in Audition. Saving peak data speeds up loading files next time. By default, Audition saves peak files for wav files only. Other file types don’t need them. Audition can’t open those natively. They must decode into wavs first. Newer .pkf peak files have Floating Point data. Older .pk files don’t.
To speed up waveform display, peak files generate automatically in Audition 2.0. Waveform generates once only. Turn off automatic generation by deselecting “Save Peak Cache Files” in Preferences.
Adobe acquired Syntrillium in May 2003. It rebranded Cool Edit Pro as Adobe Audition.
Adobe Audition