Why Your GarageBand Export Sounds Quiet — and How to Finish It on Your Mac

You finish a song in GarageBand, export it, drop it into a playlist next to a commercial release — and yours sounds small. Turn it up and it competes; at equal volume it feels thin. This is probably the single most common wall Mac musicians hit first. The short version: GarageBand isn't broken, and your mix isn't necessarily bad either. The cause is that "peak" and "loudness" are two different things. Using only what Apple says in its own documentation, this post explains why exports sound quiet, what GarageBand can honestly do about it on its own, and how to finish the track entirely on your Mac after export.

First, the facts: GarageBand already exports as loud as it can without distorting

Here's a setting most people have never seen. According to Apple's official guide, GarageBand for Mac has an advanced setting called Auto Normalize, on by default. Apple's description: "When selected (default), GarageBand automatically exports projects at the optimum loudness—that is, the highest volume level at which no distortion occurs."

So a quiet export isn't GarageBand slacking off. It's keeping its promise: the file has been raised to the ceiling — the ceiling defined by its loudest instant. That word "distortion" is doing the work here: the reference point is peak, the single highest moment in the file.

Peak and loudness are different things

What your ears register as "how loud this song is" isn't the highest instant — it's density: how much energy is present, for how much of the time. That's exactly what the LUFS unit measures, and it's what streaming platforms use. Spotify, for example, normalizes playback to -14 LUFS (per the ITU 1770 standard).

Now the problem becomes visible. If one snare hit or one vocal transient touches the ceiling, peak-based normalization stops right there. A commercial master has been through mastering: peaks controlled, overall density raised, then pushed against the same ceiling. Your raw GarageBand bounce has tall peaks and low average density. Same "loudest level without distortion" — very different loudness at the ear. That gap is the entire mystery of the quiet export.

What GarageBand can do on its own (honestly)

GarageBand isn't helpless here. Per Apple's guide to the master track, you can control the project's overall volume, add fade-outs, and adjust master effect settings. Just balancing your track levels and taming the one drum hit that towers over everything will noticeably improve how loud the export ends up.

But that's where the official guide's coverage ends. The step where you measure the exported file's loudness in LUFS and bring it up to commercial level is best done outside GarageBand. That step is mastering — the final pass applied to a finished stereo mix, handling loudness, tonal balance, and peaks. We compared the realistic options in How to Master a Song on Your Mac (3 options, no DAW required).

The export tip: choose WAVE (uncompressed)

If mastering comes next, the export format matters. According to Apple's documentation, Share > Export Song to Disk offers four formats: AAC, MP3, AIFF, or WAVE. Pick WAVE (or AIFF). AAC and MP3 are lossy — whatever the encoder throws away never comes back, and processing a lossy file only bakes the artifacts in deeper. Keep every intermediate step uncompressed (we covered this trap in the format section of the pre-release audio checklist).

After export: finish it without leaving your Mac

We build Tonekai, a mastering app for macOS. Drop the WAVE you exported from GarageBand onto it, and on-device AI analyzes the track and handles loudness, tonal balance, and peak control automatically — then lets you A/B the result against the original at matched volume. That matters because "louder sounds better" is the oldest bias in audio; matched-volume comparison is the only honest way to hear what actually changed. Processing is entirely local — your unreleased music never touches a server. It's free to try, and Pro is a one-time unlock, not a subscription.

Download Tonekai on the Mac App Store (free to try)

Then verify with your ears: matched-volume A/B, a listen on small speakers, the works — the meter-free checklist is in 5 checks you can do with ears alone.

FAQ

Should I turn Auto Normalize off? If you're mastering after export, it makes no difference to the final result — loudness gets decided deliberately at the mastering stage either way. Don't lose sleep over this setting.

Do I bring the mastered WAV back into GarageBand? No. Mastering is the last step, applied to your exported stereo mix. Its output is the file you release.

Will a louder master sound louder on Spotify? No. As above, Spotify levels everything to -14 LUFS; an over-crushed master just gets turned down, and the flattened dynamics are what's left. The goal is a track that doesn't sound small at equal volume — density and balance, not level. And for what mastering fundamentally can't fix — a buried vocal, a muddy arrangement — use What Mastering Can and Can't Fix as the referee.

Wrapping up

A quiet GarageBand export isn't a bug and isn't your fault — it's the gap between peak-based normalization and the loudness your ears actually measure. The fix is three steps: balance levels and tame stray peaks in the mix, export as WAVE (uncompressed), and master the exported file up to commercial level. If your Mac runs GarageBand, all three happen right there — no extra gear required.