GarageBand is a software application for Mac OS X and iOS that allows users to create music or podcasts. It is developed by Apple Inc. as a part of the iLife software package on Mac OS X.

GarageBand is a streamlined digital audio workstation (DAW) and music sequencer that can record and play back multiple tracks of audio. Built-in audio filters that utilize the AU (audio unit) standard allow the user to enhance the audio track with various effects, including reverb, echo, and distortion amongst others. GarageBand also offers the ability to record at both 16-bit and 24-bit Audio Resolution An included tuning system helps with pitch correction and can effectively imitate the auto-tune effect when tuned to the maximum level.

GarageBand includes a large selection of realistic, sampled instruments and software modeled synthesizers. These can be used to create original compositions or play music live through the use of a USB MIDI keyboard connected to the computer, an on-screen virtual keyboard, or using a standard QWERTY keyboard with the "musical typing" feature. The synthesizers are broken into 2 groups: [virtual] analog and digital. Each synthesizer has a wide variety of adjustable parameters, including richness, glide, cut off, standard attack, decay, sustain, and release; these allow for a wide array of sounds to be created.