How to master an Udio track: measure it, clean it, and check it before upload

November 12, 2026 · All posts

Udio songs reach mastering with their own history. The file may come from a download that was re-encoded, a stem you rebuilt, or an export you made yourself. Whatever the source, the order of work is the same as for any AI-generated track: check what you have, measure it, clean what needs cleaning, then master to a target and compare the result with the original.

This guide follows that order. It does not promise that a master will make a song sound like a studio release. It shows what to measure and what to change, so you can tell whether mastering helps your file at all.

Step 1. Keep the best file you have

Mastering starts from the file. A lossless source gives a limiter more to work with than a compressed copy, and a compressed copy cannot be turned back into one. Udio's download options depend on your account and have changed over time. We could not confirm the current list of formats from public sources while writing this guide, so check the download menu in your own account.

If the only file you have is compressed, master it anyway if the numbers ask for it, but keep that file untouched. Do all processing on a copy.

Step 2. Measure before you change anything

Measure the exact file you plan to release with the free LUFS checker. You need three readings:

• Integrated loudness (LUFS): the average loudness of the whole track.
• True peak (dBTP): the highest point of the reconstructed waveform, which is what an encoder sees.
• Loudness range (LRA, in LU): how much the level moves between quiet and loud parts.

For what each number means, see how to read loudness numbers.

Across the 557 tracks mastered on Echoteka in the last 180 days, the median track came in at −14.4 LUFS and the median master went out at −14.0 LUFS. Those are all-genre figures from every source, not Udio figures. We have not published a separate measurement of Udio exports, so use them only as a starting point. See music loudness in 2026 for the full picture.

Step 3. Decide from the numbers

If the file already sits at target with safe peaks and a reasonable range, a light pass is often enough. Mastering is not a rule you have to follow.

Step 4. Clean the AI marks before you limit

Generated audio often has metallic highs, narrow tones that ring, and small level jumps between sections. A limiter makes these easier to hear, not quieter. So clean first.

Use AI artifact cleanup on the file, then listen again at matched level. In the cleaned tracks we measured, the median change in loudness was about −0.02 LU, which means cleanup is not a hidden volume boost. It also cannot remove everything. Some sheen comes from the generator itself, and the honest fix for that is a new generation or a different take.

Step 5. Master to a target, and keep the peaks in check

For Spotify and YouTube, aim for about −14 LUFS integrated, with true peak at or under −1 dBTP. Spotify recommends keeping true peak below −2 dBTP if the master is louder than −14 LUFS. For the details, see Spotify loudness and true peak explained.

Work in small steps:

1. Shape the tone gently. A broad boost usually hurts an AI mix, so use narrow cuts for mud and a de-esser for sibilance.
2. Set the loudness with a limiter or a gain step, then check the true peak.
3. Stop when a change no longer helps. Each extra decibel of limiting takes some dynamics with it.

The mastering calculator helps you work out how much gain a file needs to reach a target.

Step 6. Compare at the same loudness

Louder almost always sounds better for the first ten seconds. Compare the original and the master at matched integrated loudness, or the comparison tells you about volume, not quality. Listen on the speakers or headphones you use for mixes, then on a phone.

Keep the untouched original. You may want to go back to it, and a second master that keeps more dynamics is sometimes better than the first. See a second master that keeps the dynamics.

Common mistakes with Udio masters

• Mastering the MP3 as if it were a WAV. A lossy file already lost detail. Cleaning it can help, but it cannot restore what was removed.
• Chasing −9 LUFS. On streaming, the file is turned down anyway, and the track loses the contrast that made it work.
• Skipping the true-peak check. A file that measures fine by LUFS can still clip once a streaming service encodes it.
• Judging by volume. A louder file wins the first comparison and loses the second.

FAQ

Do I need to master an Udio song before releasing it? If it goes to a streaming service, check loudness and true peak at least. Many files are close to a usable level, but few are ready without a check.

What LUFS should an Udio track be? About −14 LUFS integrated for Spotify and YouTube, with true peak at or under −1 dBTP. Louder files are turned down on Spotify, so there is no gain in aiming higher.

Does mastering change where the music came from? No. Mastering changes how the track sounds, not how it was made. Check the terms of your Udio plan and the disclosure rules of the platform you release to. See how to release an AI-assisted track honestly.

Can I master a clipped Udio file? Partly. Clipping that was already in the file cannot be fully undone, but a repair can reduce its effect. See how to fix clipped audio and the declipper.

Why does my master sound flat after mastering? Usually it was pushed too loud, and the limiter removed the contrast the track had. Try a quieter target and check the loudness range.

What we could not confirm

We could not confirm Udio's current download formats and plan limits from public sources while writing this guide. Check your account before you plan a master. Our loudness figures are all-genre aggregates from Echoteka, not Udio-only measurements. This guide reflects the position as of November 2026.