
AI Mastering
AI Mastering is an online audio mastering service that uses AI to improve music sound quality.
What AI Mastering is
AI Mastering is an online audio mastering service that uses AI to improve music sound quality. Its limiter can balance loudness and dynamic range, while the web interface lets users set target loudness and mastering level. The interface also supports drag-and-drop uploads, output-format customization, spectrum analysis, and loudness analysis. An API supports audio upload and download, mastering, and changes to mastering settings; its documentation links JavaScript (Node) and Ruby client libraries and tutorials. An offline desktop version is also available, and the maker says its focus is shifting toward that version rather than the API. Offline file size depends on the computer’s memory, unlike the online service’s file limits. The maker says online waiting time cannot be shortened and suggests the offline version as a way to reduce it. A bass-preservation option can reduce low-frequency attenuation. Users retain control over mastered tracks without service restrictions. The free plan lists unlimited mastering. Supported input formats are WAV, MP3, and MP4, and WAV export is available.
Good
- Free plan lists unlimited mastering.
- Limiter can balance loudness and dynamic range.
- Web tools include spectrum and loudness analysis.
- Offline file size depends on computer memory.
- Users retain control over mastered tracks.
Watch out
- Online version has file limits.
- Online waiting time cannot be shortened.
- Maker says its focus is shifting toward the offline version.
Who it suits
AI Mastering suits musicians who want automated mastering and controls for loudness, mastering level, and output format. The offline version may suit people seeking to avoid the online service’s file limits or waiting time.
Verdict
AI Mastering offers online and offline workflows, with adjustable mastering controls and an API. Consider the online file limits and waiting time, or whether the offline version fits your needs.
Plans and prices
From AI Mastering's own pricing page, checked 15 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free Plan | Free | Unlimited mastering |
The facts
Each one read from AI Mastering's own pages, with the date it was checked.
What it does
- API
- The API supports audio upload and download, mastering, and changes to target loudness and mastering level.checked 2 Oct 2026
- API clients
- The API documentation links JavaScript (Node) and Ruby client libraries and tutorials.checked 2 Oct 2026
- API functions
- The API supports audio upload and download, mastering, target-loudness changes and mastering-level changes.checked 15 Oct 2026
- API specification
- The API is described with the OpenAPI specification and linked through SwaggerHub and a raw specification.checked 15 Oct 2026
- Automatic mastering
- The service says AI brings music sound quality closer to commercial music.checked 2 Oct 2026
- Bass setting
- A bass preservation option can reduce low-frequency attenuation.checked 2 Oct 2026
- CLI authentication
- The CLI generates a separate guest API key for each command and requires no configuration.checked 15 Oct 2026
- CLI maintenance warning
- The CLI repository warns that maintenance of the auxiliary tool is not guaranteed.checked 15 Oct 2026
- CLI tools
- The public aimastering-tools repository provides command-line tools for the API with Windows, macOS and Linux installation instructions.checked 15 Oct 2026
- Controls and analysis
- The web interface offers drag and drop, target loudness and mastering level customization, output format customization, spectrum analysis, and loudness analysis.checked 2 Oct 2026
- Copyright date
- The site footer carries a 2018 AI Mastering copyright notice.checked 15 Oct 2026
- Data disclosure policy
- The privacy policy says personal information is not provided to third parties without consent except for listed legal and operational exceptions.checked 15 Oct 2026
- Desktop version
- The maker released an offline desktop version and says development emphasis shifted toward it rather than the API.checked 15 Oct 2026
- Drag-and-drop workflow
- The web interface accepts audio by drag and drop.checked 15 Oct 2026
- High frequency support
- The maker says frequencies up to 24 kHz are possible when the source sample rate is at least 48 kHz and the same rate is selected in custom settings.checked 2 Oct 2026
- Large-file limit
- The FAQ says offline file size is primarily limited by the computer's available memory, unlike the online service.checked 15 Oct 2026
- Limit: distortion reports
- A Reddit user testing an AI mastering site reported too much added distortion and said they were not ready to entrust a project to it.checked 15 Oct 2026
- Limit: quality ceiling
- Reddit commenters repeatedly described automated masters as below what a skilled engineer or careful manual processing can achieve.checked 15 Oct 2026
- Loudness analysis
- The interface includes loudness analysis.checked 15 Oct 2026
- Loudness and dynamics
- Its limiter can balance loudness and dynamic range.checked 2 Oct 2026
- Mastering level
- Users can adjust the mastering level.checked 15 Oct 2026
Money
- Limit: price criticism
- Several Reddit commenters criticized paying about $5 per song for automated mastering and preferred free tools or subscriptions.checked 15 Oct 2026
The company
- Maker
- The service provider is Bakuage Co., Ltd.checked 2 Oct 2026
- Maker legal name
- The commercial-notation page identifies the seller as Bakuage Co., Ltd.checked 15 Oct 2026
The full review of AI Mastering
Overview
AI Mastering is an AI-powered audio mastering service designed to improve music sound quality. Its automatic mastering aims to bring tracks closer to commercial music, while a limiter balances loudness and dynamic range. Users can work through the web interface, an API, or an offline desktop version; the maker says its focus is shifting toward the desktop version rather than the API.
Online mastering involves a wait that users cannot shorten. The maker suggests the offline version as an alternative when that wait is a concern. The offline version does not share the online service's file limitations: its maximum file size depends on the computer's memory.
AI Mastering supports reference track matching, loudness targets and WAV export. The maker says users retain full control over their mastered tracks, without service restrictions.
Key features
The web interface accepts audio by drag and drop and lets users customize target loudness, mastering level and output format. Spectrum and loudness analysis provide ways to examine a track alongside those settings. Supported input formats are WAV, MP3 and MP4.
A bass preservation option 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 same rate is selected in custom settings.
The API handles audio upload and download, mastering, and changes to target loudness and mastering level. Its documentation links to JavaScript (Node) and Ruby client libraries and tutorials.
Pricing
AI Mastering is free. The Free Plan is free, billed at $0 / Month, and includes Unlimited Mastering. A free plan is available.
Platforms
Listed platforms are Android, API, extension, iOS, Linux, macOS, self-hosted, web and Windows. The service also has an offline desktop version. Supported input formats are WAV, MP3 and MP4, and WAV export is available.
Who it's for
AI Mastering may suit musicians and other users who want automated mastering with controls for loudness, mastering level and output format. Its analysis tools can be useful to those who want to inspect spectrum and loudness, while the bass preservation setting and reference track matching provide additional options for shaping a result.
The online service has a wait that cannot be shortened, so users who need to avoid that online delay may prefer the offline version. Its file-size limit depends on the computer's memory rather than matching the online service's limits. Users interested in integrating mastering into a workflow can use the API, though the maker says development focus is shifting toward the offline version.
Pros and cons
- Pros: Free plan with Unlimited Mastering; supports reference track matching, loudness targets and WAV export; offers customizable mastering controls and spectrum and loudness analysis; provides web, API and offline desktop options.
- Cons: Online waiting time cannot be shortened; offline file-size capacity depends on the computer's memory; the maker says its focus is shifting away from the API toward the offline desktop version.
Alternatives
Other options in AI Music Mastering Software include Matchering, SoundBoost.ai, TrackGleam, SongUp AI, HanoLab Mastering, MasterForge, Tunr and Barichord Audio Lab.
Verdict
AI Mastering combines automatic processing with adjustable loudness and mastering level, audio analysis, reference matching and WAV export, with a free plan listed at $0 / Month. Its online waiting time is an important limitation, while the offline desktop version offers a way around that wait and has file-size capacity determined by the computer's memory. The choice between its interfaces depends on whether online convenience, offline processing or API integration matters most.
The service provider is Bakuage Co., Ltd. Its privacy policy says personal information is not provided to third parties without prior consent except in specified cases, including legal requirements. The site lists email and telephone contact options, and directs privacy policy inquiries to the email contact listed under Service Provider.
Getting started
- Open the AI Mastering website.
- Choose the web service, API or offline desktop version.
- For web mastering, drag and drop a WAV, MP3 or MP4 file.
- Set the target loudness, mastering level and output format as needed.
- Use the API documentation for the linked JavaScript (Node) or Ruby clients and tutorials.
Limits worth knowing
The free plan lists unlimited mastering. Online files have limits, and the maker says online waiting time cannot be shortened; offline file size depends on the computer’s memory. 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.
Questions
How much does AI Mastering cost?
The Free Plan is listed as free, billed at $0 per month.
Is there a free plan?
Yes. The Free Plan lists unlimited mastering.
What audio formats can it use?
Supported inputs are WAV, MP3 and MP4. WAV export is available.
Does AI Mastering have an API?
Yes. The API supports audio upload and download, mastering, and changes to target loudness and mastering level. Its documentation links JavaScript (Node) and Ruby clients and tutorials.
Is an offline version available?
Yes. An offline desktop version is available; its maximum file size depends on the computer’s memory.
Who provides AI Mastering?
The service provider is Bakuage Co., Ltd.
Alternatives to AI Mastering
- 1

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