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.
Aside from being utilized in relation to sounds, the file extension .pk is also implemented in bitmap fonts associated with TeX typeface. The file extension .pk represents the packed bitmap of the typeset system that is intended to produce books utilizing high quality fonts with minimal user exertion, which can be replicated in all systems without degrading the display.The file extension .pk is extensively used in the representation of formulae for mathematical computations, which are utilized by scientists and professors. The typeface has been a convenient replacement for the UNIX troff that was the preferred choice, especially on UNIX system installations. The TeX program falls under the free license category of products.The file extension .pk is likewise used by LaTeX, which is a compressed typeface format of the TeX font. The file extension .pk represents the readable portions of the TeX package, and is intended to simplify the creation of TeX typesets. Currently, the lead in advancing the technology associated with the typeset, resides with the LaTeX3 project, with many styles being contributed by many developers including those from CTAN (Comprehensive TeX Archive Network).In essence, the LaTeX file associated with the file extension .pk, is considered a programming development language that utilizes the LaTeX markup. This is referenced by the macro to generate the final output form of the document.