Understanding Tracks: Audio vs. Software Instrument vs. Drummer

Almost every confusing moment early on in GarageBand comes down to one thing: using the wrong track type. Get this straight and half the app suddenly makes sense.

Audio tracks

An Audio track records real sound through a microphone or instrument plugged directly into your Mac — your voice, a guitar, a room recording. What gets recorded is an actual sound wave (you'll see it drawn as a waveform), and that waveform is exactly what plays back. There's no "changing the instrument" after the fact — if you sang it, it stays a vocal recording.

Use an Audio track for: vocals, acoustic guitar, podcasts, field recordings, anything you're capturing with a microphone or line input.

Software Instrument tracks

A Software Instrument track doesn't record sound directly — it records performance data: which notes you played, how hard, and for how long (this data format is called MIDI). GarageBand then uses a virtual instrument — a piano, a synth, strings, an 808 bass — to turn that data into sound in real time.

The magic of this is that everything stays editable after you record it. You can change the notes, fix the timing, or swap the piano sound for a completely different instrument, all without re-recording anything.

Use a Software Instrument track for: anything played on a MIDI keyboard, or anything you want the flexibility to edit and re-voice later.

Drummer tracks

A Drummer track is a special case of a Software Instrument track. Instead of you playing notes, you choose a virtual session drummer and a style, and GarageBand generates a full, human-feeling drum performance — which you can then edit for intensity, complexity, and which drum kit pieces are used.

Use a Drummer track when you want solid drums fast, without programming every hit by hand.

How to tell which track you're looking at

Each track's icon in the header hints at its type — a microphone-style icon usually marks an Audio track, an instrument icon marks Software Instrument, and Drummer tracks show a stylized drum kit. When in doubt, click the track and check what appears in the Smart Controls panel: Audio tracks show basic level and effects controls, while Software Instrument and Drummer tracks show a full instrument or drummer editor.

Adding a new track

Use the + button above the track area to add a track, and GarageBand will ask which type you want before it's created. You can add as many tracks of each type as your project needs — a typical song might have one or two Audio tracks for vocals, several Software Instrument tracks for keys, bass, and synths, and one Drummer track.

What's next

Now that you know the difference, the next two lessons walk through actually recording into an Audio track and a Software Instrument track, one at a time.