How to Master a Suno Song
Published · updated · by Loopin
Mastering a Suno song is five moves in a fixed order: get the WAV, cut the low-mid mud, soften the harsh top, check mono, then limit to about −14 LUFS with a −1 dBTP ceiling. Skip straight to step five and you’ll just make the problems louder.
Download the WAV, once
At the time of writing (October 2026), Suno offers WAV downloads on its paid Pro and Premier plans from the website (mobile defaults to MP3), and since September 3, 2026 downloads are counted: Suno’s help centre lists 20 song downloads a month on Pro, 60 on Premier, and a small number of lifetime trial downloads on free accounts. Grabbing MP3 and WAV of the same song counts as one download, so always take the WAV.
If an MP3 is all you have, master that directly. Converting it to WAV first doesn’t restore anything; it just makes a bigger file. If the song clips or distorts on export, read why Suno songs clip on export before going further.
Cut 1.5–2 dB of mud between 250 and 500 Hz
Suno arrangements stack instruments without the gaps a human mix leaves, and it piles up in the low mids: the song sounds thick and undefined rather than punchy. Sweep a narrow boost through 250–500 Hz, find where it sounds most congested, and make a wide 1.5–2 dB cut there.
If nothing stands out, skip it. Not every export needs it, and cutting where there’s no problem just thins the track. Our Suno EQ guide has frequency-by-frequency starting points.
Soften 4–7 kHz before adding any brightness
The other common Suno problem is a brittle edge on vocals and synths around 4–7 kHz that gets more tiring the longer you listen, and much worse once the song is loud. A narrow 2–3 dB dip there does more than any smoothing compressor. If it’s only on the vocal, a de-esser tuned to that range is more targeted.
Only after that, if the song feels dull, add about 1 dB of shelf at 10–12 kHz. Brighten first and you’ll fight the harshness all the way to the limiter. More on this in fixing harsh Suno vocals.
Fold to mono and fix anything that vanishes
Some Suno exports come out unusually wide. Sum to mono for a chorus: if the vocal, bass or guitars drop or sound phasey, narrow the stereo width, especially below 200 Hz, where nothing should be wide. A lot of Suno music is first heard as a clip on a single phone speaker, which is effectively mono.
If the song sounds small in mono rather than hollow, that’s a different problem: thin arrangement, not width. Fixing a thin Suno song covers it.
Master to −14 LUFS and pick a feel
Now make it loud. Upload the corrected WAV to free online mastering for Suno tracks: no account, and the default export is a 16-bit WAV at about −14 LUFS with a −1 dBTP ceiling, matching what Spotify, Apple Music and YouTube normalise to. For denser genres try Punchy (about −11 LUFS) or Club (about −10); for ballads and scores, Cinematic (about −16).
Use the loudness-matched Original/Mastered A/B to check the master sounds better, not just louder. Then play it on a phone at half volume and in a car. If it holds up, download the finished master and move on to release; the Suno release checklist covers what comes next.
Adjust by genre
Rap and trap: Punchy, keep the 808 out of 250–500 Hz mud. Dance and EDM: Club, and check the kick survives the limiter. Lo-fi: the Lo-fi feel, and leave the dynamics alone. Acoustic and singer-songwriter: Warm, and don’t push past −14 LUFS.
Mastering several Suno songs for one release? Keep the same feel across them and check levels side by side; mastering Suno songs for an EP shows how.
Frequently asked questions
How do I master a Suno song for free?
Download the WAV, cut low-mid mud and 4-7 kHz harshness if you hear them, then upload to Loopin's free online mastering. It needs no account and exports a WAV at about -14 LUFS with a -1 dBTP ceiling.
What LUFS should I master a Suno track to?
About -14 LUFS integrated with a true peak of -1 dBTP or lower. Denser genres can go to about -11 LUFS. Louder than that gets turned down on streaming anyway.
Should I download Suno songs as WAV or MP3 for mastering?
WAV. At the time of writing, downloading MP3 and WAV of the same song counts as one download on Suno, so there's no reason to take the MP3 only.
Why does my Suno song sound muddy?
Instruments stack up between 250 and 500 Hz. A wide 1.5-2 dB cut at the most congested spot usually clears it without thinning the track.
Why do Suno vocals sound harsh after mastering?
The limiter makes the 4-7 kHz edge louder. Dip that range by 2-3 dB before mastering, and add brightness only afterward if needed.
Do I need stems to master a Suno song?
No. A stereo WAV is enough for mastering. Stems help only when one part, usually the vocal, is badly out of balance.