.PK File Extension
File Type 1Audition Peak File
What is a PK file?
Contains the visual representation of an audio waveform for a corresponding audio file; generated automatically by Audition and Cool Edit Pro when an audio file is opened; saved in the same folder as the original audio file.
By default, peak files are generated for all audio files opened in Audition 2.0. This speeds up the waveform display process since the waveform only needs to be generated the first time. You may turn off the automatic peak file generation by choosing "Edit→Preferences→Display." Then deselecting "Save Peak Cache Files."
Adobe acquired Syntrillium in May 2003 and rebranded the program Cool Edit Pro as Adobe Audition.
File Type 2Packed METAFONT File
.PK File Association 2
Compressed font file created by GFtoPK, a program included with some TeX software distributions; contains the compressed copy of a .GF METAFONT bitmap font file and is used for maintaining smaller font sizes.