🔥 Introducing Mastering Engine v3.5
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Instant professional
music mastering

Online mastering in seconds*

  • No presets — customized for your track
  • Guide the AI with words and hear the magic
  • e.g. "I want to sound like Billie Eilish" or "Wide stereo field"
  • Paste any Spotify link for reference mastering
  • Instant optimization for:
    Spotify
    YouTube Music
    Apple Music
    Bandcamp
    SoundCloud
    Deezer
    TIDAL
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ALL FORMATS
Plans of Fictional Talks cover

Plans of Fictional Talks

Berkan Cesur

Electronic
Love Is Gonna Save Us cover

Love Is Gonna Save Us

Berkan Cesur

Synthwave
Resonance cover

Resonance

Berkan Cesur

Lo-Fi
FLATLINE FREAK cover

FLATLINE FREAK

Untalented and Unaware

Plans of Fictional Talks cover

Plans of Fictional Talks

Berkan Cesur

Electronic
Love Is Gonna Save Us cover

Love Is Gonna Save Us

Berkan Cesur

Glasxs
GlasxsSpotify
Musician
Singer, producer, sound designer

“I've spent so much on VST plugins. I wish I had found this sooner, sounds amazing on every track. Best online mastering service i have ever tried.”

★★★★★5/5
Trusted by 31,000+ musicians

Text Prompts & Audio Mastering

How it works?

Your Music (.wav, .mp3)
Prompt:
"Warm, powerful & wide stereo"
+Effects & Filters
SoundBoost.ai
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Mastering ON
For audio professionals, musicians, mastering engineers
or starter bedroom producers.
Streaming OptimizedOur AI mastering optimizes your audio for Spotify, Apple Music, CD, and more...
Safe & Secure
Safe & SecureWe DO NOT train our AI on your music and share it with third parties, unlike our competitors. It's 100% ethical.
Endless FlavorsDescribe the sound you are aiming for, or tweak some knobs. Sonic possibilities are only limited by your imagination!

SoundBoost FAQ

Mastering Engine v3.5 gives you six distinct AI mastering engineers (Default, Sophia, Alex, Marcus, Luna, Kai) analyzing your mix 30% deeper than our previous version, so you're getting genre-aware moves instead of a generic preset.

Pair that with prompt-to-mastering—type "give me festival energy" or "smooth out my jazz trio"—and the engine chains the right EQ, compression, and saturation in seconds.

Upload a WAV, pick an AI engineer, and you're hearing a streaming-ready online mastering in under a minute while the suite keeps loudness, true peak, and stereo balance dialed in automatically.

When you're happy, export and instantly convert to MP3, WAV, FLAC, OGG, AAC, or M4A in 16/24/32-bit at 44.1 or 48k with the built-in conversion feature.

Yes—our iOS app mirrors the desktop suite so you can upload tracks, tweak prompts, and publish from your iPhone or iPad without losing quality.

Log in with your SoundBoost account and keep working wherever inspiration hits; your mastering history travels with you.

You're always in the driver's seat: dial intensity, toggle Analog Warmth, switch Mastering on/off to A/B, and pick the engineer profile that fits the vibe in real time.

Need something ultra-specific? Reference Mastering lets you select a favorite track and have the engine chase its loudness curve, tonal balance, and dynamics automatically.

Use our Loudness Penalty & Device Simulation tool to preview how Spotify, YouTube, Apple Music, cars, laptops, and phones will treat your mix before you release.

For loudness prep, our browser-based LUFS meter and Loudness Range analyzer run locally with ITU-R BS.1770-4 accuracy, so you can trust every readout without uploading a file.

Every membership includes unlimited mastering credits—no more rationing exports or buying add-on packs just to finish an EP.

Pick the cadence that fits: weekly for sprint releases, monthly for active artists, or annual for teams who live in the studio—all with the same pro feature set.

We don't train our models on your masters or hand them to third parties, period.

Client-side tools like the LUFS Meter, Loudness Penalty analyzer, and ID3 Tag Editor run entirely in your browser, isn't it so cool?