Overview

AI Mastering is an audio mastering service for musicians who want automated processing with adjustable loudness and mastering controls. Its mix of web, API and offline options suits both individual creators and developers, but online processing waits cannot be shortened.

Automatic mastering aims to move music closer to a commercial sound, while a limiter balances loudness and dynamic range. The service also supports reference-track matching, loudness targets and WAV export. Users retain control of their mastered tracks without service restrictions, according to the maker.

Key features

The web interface accepts drag-and-drop audio and lets users set target loudness, mastering level and output format. Spectrum and loudness analysis help users inspect the result and guide adjustments. WAV, MP3 and MP4 are supported inputs, making the service useful for common audio files as well as video containers.

A bass-preservation setting can reduce attenuation in low frequencies. The maker says frequencies up to 24 kHz are possible when the source sample rate is at least 48 kHz and that rate is selected in custom settings. That makes the option relevant to users working with high-sample-rate material, but it depends on the source and configuration.

The API supports audio upload and download, mastering, and changes to target loudness and mastering level. JavaScript (Node) and Ruby client libraries and tutorials provide starting points for developers. The maker says its focus is shifting toward the offline desktop version rather than the API, so developers should weigh that direction before building around the service.

The offline desktop version avoids the online service's file limitations; its maximum file size depends on the computer's memory. It is also the maker's suggested way to reduce the online wait, which users cannot shorten. That trade-off favors users able to work locally over those who need quick online processing.

Pricing

The Free Plan is free, billed $0 / Month, and includes Unlimited Mastering. That is a strong fit for independent musicians who want recurring mastering without a per-track charge. No paid plan terms are provided here, so readers seeking a paid tier should expect custom pricing.

The plan's unlimited mastering does not remove the practical constraints of online waiting or file limits. Users with large files can turn to the offline version, where maximum file size depends on available computer memory. The plan's listed price is free, so there is no paid renewal or seat commitment to weigh.

Platforms

AI Mastering is available on web and as an offline desktop version, with an API for programmatic use. Its published platform range also includes Android, iOS, Linux, macOS, Windows, extension and self-hosted. The strongest explicit workflow details are for the web interface, API and offline desktop option.

Who it's for

AI Mastering is best suited to musicians who want unlimited free mastering, control over loudness and output, and the choice between online and local processing. The analysis tools and bass option make it more adjustable than a single-button workflow, while the API may suit teams automating uploads and mastering.

It is less compelling for someone who needs predictable online turnaround, since the wait cannot be shortened, or for developers who want the API to remain the maker's main focus. Users handling large files may prefer the offline version, provided their computer has enough memory.

Pros and cons

Pro: Unlimited mastering on a free plan makes repeated track work possible without a paid per-master cost.
Pro: Target loudness, mastering level, output format and audio analysis offer meaningful control over processing.
Pro: Offline processing avoids online file limitations and can reduce dependence on the unshortenable online wait.
Con: Online waiting cannot be accelerated, which is a drawback for time-sensitive work.
Con: Offline maximum file size depends on computer memory, so handling large projects is not guaranteed on every machine.
Con: The maker is shifting focus toward the offline version rather than the API, a consideration for API-dependent workflows.

Alternatives

AI Music Mastering Software is a directory list for readers who want to compare more options in the category.

Choose Auralith Forge if you want a web-based alternative with a one-time Single Master option at 2.99 EUR per once, or a free tier with three full-length masters and unlimited 30-second previews.

Matchering is another free option, with Linux, macOS, self-hosted, web and Windows support and an open-source GPLv3 license.

Consider SongUp AI for a web-based alternative whose free plan includes three instant songs for personal use.

SoundBoost.ai may suit users who want Android or iOS access; its free plan allows 10 revisions per project but does not allow finalizing or downloads.

Choose TrackGleam for free mastering with WAV and MP3 output and no watermark or sign-up.

Free Music Creator AI Mastering is a web alternative whose free plan includes two songs per month and one music generation per month, for personal use.

Tunr is an alternative for users seeking a free macOS or Windows mastering tool.

Barichord Audio Lab offers a web-based alternative.

Verdict

AI Mastering is a sensible choice for musicians who want free, repeatable mastering with adjustable controls and a local-processing option. Unlimited mastering and the offline version are its clearest advantages; look elsewhere if online turnaround is critical or your workflow depends on an API the maker is deprioritizing.

	AI Mastering	One Master
Free plan	Yes
Free trial		Yes
Paid from	Free
Platforms	Android, api, extension, iOS, Linux, macOS, self-hosted, Web, Windows	Web
Free plan	Yes	No
Reference track matching	Yes	Yes
WAV export	Yes	Yes
Loudness targets	Yes	Yes
Input formats	WAV, MP3, MP4
Stem mastering		Yes
Supported platforms		web

AI Mastering vs One Master

AI Mastering

One Master