Burnish

Master your song.
Keep its sound.

Burnish brings your song up to the loudness Spotify and Apple Music expect and changes as little as it can on the way. Every move is printed in plain language and in decibels, so nothing is a black box. Made with Suno or Udio and hear a dull top end or mud? Turn on Repair.

It works on any mix, not just AI songs. No account, no signup. Master any track and hear the whole thing free, then pay once if you want to keep it. No subscription, and credits never expire.

Hear the whole master free. Download it for $25 for 5 downloads, about $5 each, no subscription, and they never expire. See pricing

Hear it now, no upload needed. Eight tracks, before and after, pick the one nearest your own:

1 Your track

2 Genre

R&B / Hip-Hop / Latin

Electronic

Pop / Rock / Metal

Acoustic / Jazz

Classical

3 Settings

Off by default, because it changes the sound more. Turn it on if your song has a dull top end, a hard cutoff or low-mid mud. It only applies what it measures in your file. With the AI repair on, Burnish compares the song's later sections with an early chorus and gently corrects a top end or low end that fades as the song goes, a common Suno v6 complaint. At most 3 dB per band, and the report lists every section and change. If the song does not drift, nothing is changed. Untick to keep the low end stereo, for wide ambient or acoustic mixes where the spread below 100 Hz is part of the sound.
Free: up to 10 masters a day, full previews and reports · downloads unlock with a credit
Keeps your song's sound

The default is a light master that changes as little as it can. Repair is there when you want it: it measures your file and treats only what it finds. Suno, Udio, or any mix.

Shows its work in dB

Every move printed in decibels, plus the loudness and true peak it landed on, held to −1 dBTP. A full before and after report, not a black box.

Pay once, no subscription

Hear 45 seconds of every master free, normal and Loud. A credit unlocks a download, one credit per master, and it never expires. No subscription, no royalty on your music, no lock-in.

Burnish makes your track sound finished. It does not hide that the track is AI, and it will not strip a watermark or beat a detector. A real master ages better than a trick.

Also on iPhone and iPad

The same engine, running on your device. Fully offline, no upload. Mastering and listening are free. Saving a master is a one-time purchase, no subscription. Burnish Pro adds an AUv3 plugin for GarageBand and Logic Pro for iPad.

Download on the App Store

Questions

Is there an iPhone app?

Yes. Burnish for iOS runs the whole chain on your iPhone or iPad, offline, and Burnish Pro adds an AUv3 plugin for GarageBand and Logic Pro for iPad. It is a separate purchase from web credits. Mastering and listening are free, and saving a master is a one-time purchase, no subscription.

What does Burnish do to my track?

It measures your mix and masters it to the loudness streaming platforms expect, with a light touch so your song keeps its sound. Every move it makes is printed on a before and after report, so nothing is a black box.

Does it work on Suno and Udio songs?

Yes. It masters them like any other song. If yours sounds dull or muddy, turn on Repair: it measures your file and treats only what it finds, then masters.

How much does it cost?

You master and preview for free. You buy a credit only when you want to download, and one credit unlocks one master in every format, forever. There is no subscription.

What formats do I get?

Two versions of every master. Streaming, at your genre's level with true peak under -1 dBTP, and Loud, a denser and louder cut with the same peak ceiling. The report shows the loudness of each. Each comes as MP3 320, 16-bit WAV and 24-bit HD WAV. One credit covers both.

Will my track be loud enough for Spotify and Apple Music?

It hits your chosen loudness target and holds true peak to a safe ceiling, verified on your file at 4x oversampling. The measured numbers are on the report.