Peak is a digital audio editing application for the Macintosh, used primarily for stereo/mono recording, sample editing, loop creation, and CD mastering.

It is commonly used by amateur and professional audio and video editors, mastering engineers, musicians, sound designers, artists, educators, and hobbyists.

[1] It was published by the now defunct company BIAS Inc. in several editions, with varying levels of features.

Peak can be assigned to many DAW-type applications as a supplemental external sample editor.

When used this capacity, it is similar to having Peak's editing capabilities available as a plug-in, within the other application.