By the end of this guide you will have taken a finished mix of a song, run it through an AI mastering tool and exported a version that is louder, more balanced and ready to release or share. The job is done by an automatic mastering engine: you upload the track, set a few targets, and the tool processes it and gives you a master to compare with the original.
To master a song with AI you need a complete mix first, because mastering polishes a mix and does not repair one. This guide covers the preparation, the settings and the checks, and compares five tools from our Audio and voice category.
Key takeaways
- Export a finished stereo mix, upload it to an AI mastering tool, set the loudness target, then compare the master against your mix on more than one speaker setup before you release it.
- The main decision is how you want to work: an online service (LANDR, AI Mastering), a tool inside a vocal or song-making suite (Kits AI, Pozalabs), or an editor for spoken audio (Resound).
- Free options exist but come with trade-offs. AI Mastering is free but has no support, a waiting time and a file size limit.
- AI mastering will not fix a weak mix. Treat the result as a strong first pass and trust your ears.
What you need before you start
- A finished mix. Export your song as a stereo WAV file. Avoid exporting from a source that has already been squashed with a limiter on the master channel.
- Headphones and a second playback system. A phone speaker or car stereo shows problems that studio headphones hide.
- A reference track. One released song in your genre, to compare the loudness and tone.
- An account or an install. Most tools are online. AI Mastering also has an offline desktop version.
- Time. Under an hour for one song, including comparing versions.
- Difficulty. Easy. The skill is in listening, not in settings.
Which kind of AI tool fits this job
Choose by how much control you want and what else you need around the master.
A music platform with mastering at its centre. LANDR is described as a music production platform whose best-known feature is automated AI mastering. You upload a track, and LANDR says its engine processes it without presets to produce a release-ready master. Mastering is available online, as a plugin inside your DAW and in the LANDR mobile app. The LANDR Studio subscription also bundles distribution to more than 150 streaming and social platforms, a sample library and plugins.
A free, no-frills service. AI Mastering lets you drag and drop a file, set a target loudness and mastering level, choose the output format and check the result with spectrum and loudness analysis. It is free, has an open-source algorithm and a desktop version that runs offline, but the vendor provides no warranty and no support.
A vocal and production toolkit with mastering as one feature. Kits AI is a browser-based vocal production toolkit that lists AI mastering alongside voice conversion, a vocal remover and a stem splitter. Pozalabs is a Korean AI music company whose LAIVE platform generates songs and includes a one-click mastering feature for AI-generated tracks. These make sense when you are already using their other tools.
An editor for spoken audio. Resound is built for podcasts, not songs, but its Enhance feature mixes and masters audio with AI. Use it if the same service must also handle a podcast or voice-over.
Step 1: Finish and check the mix
Mastering works on the whole track, so any problem in the mix will carry through.
- Listen to the full song at a low volume and at a normal volume. Fix anything that jumps out, such as a harsh vocal or a boomy bass.
- Leave some headroom on the master channel and remove any limiter you added to make the song louder.
- Make sure the song starts and ends where you want, including any fades.
- Save a copy of the mix so you can return to it.
Check it worked by playing the mix through a phone speaker and confirming that the vocal and the beat both come through.
Step 2: Export a high-quality file
Give the tool the cleanest source you can.
- Export a stereo WAV at the project's native sample rate if your software allows it.
- Avoid exporting a compressed MP3 for mastering. Each re-encode loses detail.
- Name the file clearly, with the song title and version.
- Check any file size limit. AI Mastering notes that its online version limits file size, while the offline version is limited by your computer's memory.
Check it worked by opening the exported file in a player and confirming it plays all the way through.
Step 3: Choose a tool and plan
Pick one service that fits how you release music.
- If you want to master and then distribute, look at LANDR, whose Studio subscription includes distribution.
- If you want a free try or offline use, look at AI Mastering.
- If you already use Kits AI or Pozalabs for vocals or song generation, check their mastering features first.
- Check the free plan or trial. LANDR's listing says a free plan is not described, so check its pricing page. AI Mastering shows a Free Plan at $0 with unlimited mastering.
Check it worked by finding the plan you need on the vendor's pricing page.
Step 4: Upload and set your targets
You want the tool to master toward a loudness that suits where the song will be heard.
- Upload your WAV file.
- Set the target loudness and mastering level if the tool offers them. AI Mastering lets you customise both, plus the output format.
- Turn on any extra options that suit the genre. AI Mastering has a bass preservation option that reduces low-frequency loss for dance music.
- Leave defaults alone if you are unsure and compare a second run with a changed setting afterwards.
Check it worked by seeing a preview or a progress indicator for the processed track.
Step 5: Compare the master with your mix
Louder always sounds better at first, so compare at matched volume.
- Switch between your mix and the master while the volume is similar.
- Listen for harshness, a squashed drum sound or a bass that has become muddy.
- Check the loudness and spectrum analysis if the tool provides it. AI Mastering shows both.
- Compare the master with your reference track, not just with your mix.
Check it worked by listening to the chorus of each version back to back and picking one on purpose.
Step 6: Adjust and master again if needed
If something is off, change one thing at a time.
- If the master is too loud or flat, lower the target loudness or the mastering level and run it again.
- If a part of the mix is the problem, fix that in your project instead and re-export. Mastering cannot fix a thin vocal or a clashing instrument.
- Keep the versions you like so you can compare them later.
- Stop when two settings sound close. More runs rarely help.
Check it worked by having a friend listen to two versions without telling them which is which.
Step 7: Export, test and release
Save the final file in the format you need.
- Download the master as WAV for distribution and keep a copy.
- Make an MP3 for sharing quickly, if you want one.
- Play the final file on at least two other systems, such as headphones and a car or phone speaker.
- If you plan to release, upload to your distributor. LANDR Studio includes unlimited distribution to 150+ streaming platforms, and other tools do not list this.
Check it worked by playing the downloaded file from your own drive, not just in the browser.
Tools for this job compared
| Tool | Good fit for | Pricing | Stated limits |
|---|---|---|---|
| LANDR | Mastering plus distribution, online, in a DAW or on mobile | Paid, from $8.25/mo (checked 24 Oct 2026) | Sample downloads capped at 2400 per year; no free plan described |
| AI Mastering | Free online or offline mastering with loudness analysis | Free | No warranty or support; online version has a waiting time and a file size limit |
| Kits AI | Vocal production with mastering as one of many tools | Freemium, paid from $10/mo (checked 24 Oct 2026) | Free plan has 0 voice slots and 0 download minutes; unlimited usage is subject to fair use |
| Pozalabs | Mastering songs generated with LAIVE | Freemium | Published prices come from announcements and may have changed; sites are primarily in Korean |
| Resound | Mixing and mastering spoken-word audio | Freemium, paid from $15/mo (checked 24 Oct 2026) | No audio recording or transcription; exported projects are deleted after 1 to 60 days |
Prices and plan limits change, so confirm the current terms on each vendor's site before you subscribe.
Common mistakes to avoid
- Mastering a weak mix. Automatic mastering evens out and polishes, but it cannot rescue a thin vocal or a muddy low end. Fix it by correcting the mix first and re-exporting.
- Choosing the louder version by default. Louder sounds better in a short test. Fix it by matching volume before you compare, and by checking against a reference track.
- Uploading an MP3 or an already limited file. Compression and a limiter on the master channel remove detail the tool needs. Fix it by exporting a clean stereo WAV.
- Relying on a free tool's support. AI Mastering states that it provides no warranty and no support. Fix it by keeping your own copies of the mix and master, and not depending on the service for a deadline.
- Skipping the real-world test. A master that sounds good on studio headphones can fall apart on a phone. Fix it by listening on at least two other systems before release.
How we put this together
This is an evidence-based guide built from each tool's listing in our directory, which is compiled from the vendor's own site and pricing page. It is not a review based on using the tools. We don't rank tools, and nobody paid to be included. Some outbound links may be affiliate links; see our disclosure.
Frequently asked questions
Can I master a song with AI for free?
Yes. AI Mastering shows a Free Plan at $0 per month with unlimited mastering, though it has a waiting time, a file size limit and no support. Kits AI has a Free plan, but its listing says that plan has 0 download minutes. LANDR's listing does not describe a free plan.
Is AI mastering as good as a human mastering engineer?
The listings do not make that comparison, and results depend on your mix and taste. AI mastering is a fast, low-cost way to get a polished first version. For an important release, you may want a human engineer to listen to it as well.
What file should I upload?
Upload a finished stereo mix as a WAV with some headroom, not an MP3. Check the tool's file size limit first, as AI Mastering notes one for its online version.
Can I master on my phone?
LANDR lists mastering in its mobile app, as well as online and in a DAW plugin. Most other tools in this guide are web based, so check the vendor's site for mobile support.
Do I still need to release through a distributor?
Yes, mastering only prepares the audio. LANDR Studio includes distribution to more than 150 streaming and social platforms, and with other tools you upload the finished master to a distributor of your choice.
Compare more options in our Audio and voice category.
