How to master Suno songs so they sound like a real release
Suno gives you a finished-sounding song, but it is not a finished file. Put it next to a commercial release in a playlist and it comes on quieter, thinner, and a little harsh on top. This guide shows what is actually different — measured on 20 Suno tracks — and how to master them.
· 7 min read
Step 1: download the right file
Suno offers MP3 and WAV downloads. Always use the WAV for mastering. An MP3 has already thrown away information above roughly 16–18 kHz and added codec artefacts; mastering an MP3 works, but you are starting from less.
If you only have the MP3 — for example an older generation — it is still worth mastering. A good tool detects where the codec cut off and works within that range instead of boosting frequencies that are not there.
Step 2: know what is wrong (measured, not guessed)
We measured 20 Suno WAV downloads against 83 commercial masters, band by band. Three things stood out.
| Measurement | Suno average | Commercial average | What it means |
|---|---|---|---|
| Loudness | −15 LUFS | −9 to −10 LUFS | Your track plays 5 dB quieter in a playlist |
| 6–12 kHz (high) | −13.7 dB | −18.1 dB | 4.4 dB brighter — sounds like 'detail', becomes fatigue |
| 12–20 kHz (air) | −21.5 dB | −26.6 dB | 5 dB brighter — the metallic sheen |
| 120–350 Hz (low-mid) | −8.3 dB | −6.7 dB | 1.6 dB thin — hollow on phones and laptops |
Two common assumptions turned out to be wrong. Suno WAVs are not already limited — true peak sits around −4 dBTP with plenty of headroom. And they are not narrow: stereo width was normal on 18 of 20 tracks. The problem is tonal balance and level, not damage.
Step 3: master it
With MasteringOne the whole process is one upload. The engine measures the file, compares it to the commercial reference curve for your style, and writes a chain for that specific track: a gentle low shelf if the low end is thin, a broad cut around 7–8 kHz to tame the sheen, tape-style saturation to add density, light multiband compression for glue, and a true-peak limiter to bring the level up to −10 LUFS without clipping.
- Drop the WAV on the upload area. Leave the style on 'AI Track (Suno/Udio)'.
- If you know where it is going, choose the release target: Spotify, YouTube and Apple Music all normalize loudness, so the engine aims for their level instead of maximum loudness.
- Optionally type what you want in plain words — 'vocals more forward', 'less harsh on top'.
- Wait about a minute. Read the diagnosis while it works.
- Use the A/B player. Turn on 'match loudness' to compare tone without the volume bias.
Step 4: check the report
Every master comes with an engineer's note describing what moved and why. On a typical Suno track you will see a small low-shelf boost around 70 Hz, a cut of 2–3 dB around 7.5 kHz, saturation at a few dB of drive, and limiter gain reduction under 2 dB. If the limiter is working much harder than that, the track was already very dense and the report will say so.
If something is not right, that report is also your revision request. 'The 7.5 kHz cut made it dull' is a precise instruction, and the engine can redesign around it.
FAQ
Does Suno already master its songs?
No. Suno's output is a mix-level file at roughly −15 LUFS with an unusually bright top end. It is not limited or loudness-matched to commercial releases.
Will mastering make my Suno song sound less 'AI'?
Partly. The metallic high-frequency sheen is one of the tells, and taming it helps. Mastering cannot change the performance or the arrangement.
Can I release a mastered Suno track?
That depends on your Suno plan; paid plans generally include commercial rights. Mastering does not change ownership.
Try it on your own track
Free 60-second preview. No account needed.