Quantara: AI-Powered Audio Mastering for Every Platform

Overview

Quantara is a free, browser-based AI audio mastering tool designed to provide transparent, professional-grade mastering for music producers and engineers. It eliminates the need for credit cards or subscriptions for basic usage, offering real-time metering, true-peak safety, and optimization for major streaming platforms, clubs, broadcast, and vinyl.

Benefits

Quantara offers several key advantages for anyone working with audio. Its transparent 9-stage mastering chain processes audio entirely within the user's browser, meaning files are not uploaded to external servers unless the user explicitly saves them to the Cloud Library. Every stage is adjustable in real-time with A/B bypass capabilities, allowing users to hear exactly how each modification affects the track. The stages include a high-pass filter, sub shelf, low-mid cleanup, presence EQ, air EQ, true mid/side stereo width, glue compression, harmonic saturation, and a true-peak limiter.

The tool normalizes audio toward specific reference levels for various destinations, ensuring compatibility across different ecosystems while maintaining a true-peak-safe ceiling. It supports streaming services like Spotify, Apple Music, Tidal, YouTube Music, Amazon Music, Deezer, and iTunes. It also includes presets for Club, Beatport, SoundCloud, EBU R128 broadcast, Dolby Atmos, and vinyl. The system utilizes BS.1770 standards for real loudness metering and true-peak detection.

Powered by Meta AI's Demucs technology, Quantara can split any track into distinct stems such as vocals, drums, bass, and instruments. It offers six models, including the high-quality htdemucs_ft model. With over 34 genre presets, the tool provides a sensible starting point for mastering based on genre characteristics rather than just loudness. Categories include Pop & Mainstream, Urban, Electronic, Rock & Metal, Latin & World, Acoustic & Classical, and Other.

Advanced workflow tools include Reference Matching, which allows users to upload a commercial track to match its tonal balance, dynamics, and loudness. The Cloud Library securely stores all uploads and masters. Users can search, filter, tag, and annotate files with BPM and key data. Files can be downloaded from any device or loaded directly into a studio. Real-time metering features a live spectrum analyzer, waveform with click-to-seek, and gain-reduction readouts directly from the compressor and limiter. A REST API is available on Label plans for automating mastering pipelines and integrating with DAW workflows or CI/CD systems.

Use Cases

Quantara is suitable for a wide range of audio professionals and enthusiasts. Music producers and engineers can use it to master tracks for various platforms without needing expensive software or hardware. The tool is ideal for those who want to optimize their audio for streaming services, clubs, or broadcast without worrying about compatibility issues.

The AI stem separation feature is useful for remixers, DJs, and content creators who need to isolate specific elements of a track. The genre-aware presets help beginners and experienced users alike to achieve a professional sound quickly by selecting the appropriate genre category. The Reference Matching tool is perfect for artists who want their music to sound similar to a specific commercial track.

The Cloud Library is beneficial for users who need to manage multiple projects across different devices. They can store their files securely and access them from anywhere. The REST API is useful for labels and large studios that want to automate their mastering processes and integrate them into their existing workflows.

Pricing

Quantara offers a flexible pricing model with no hidden fees and the option to cancel anytime. The Free Plan includes 3 free exports per month. No credit card is required for this plan. Pro, Studio, and Label Tiers offer unlimited exports and advanced features like Reference Matching and REST API access.

Users can also purchase single stereo masters for 4.99 euros or stem-mastering packs for 14.99 euros without a subscription. Credit Packs are available for users who want to buy credits once and spend them on masters or stems as needed.

Vibes

Quantara is built to be heard and verified rather than relying on invented numbers. It prioritizes honest processing by using real meters instead of estimated values. The tool avoids the loudness war by holding a true-peak-safe ceiling instead of crushing dynamics to maximum loudness. This approach ensures that the final product sounds natural and professional without sacrificing quality for volume.

Additional Information

Quantara supports various input formats including WAV, MP3, FLAC, M4A, AIFF, and OGG. The output formats include WAV 16-bit for CD quality, WAV 24-bit for studio use, and WAV 32-bit float for Label plan users. All exports are true-peak limited at -1 dBTP to ensure safety across all playback systems.