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About

LuvLang.studio is a browser-based audio mastering platform for independent musicians, producers and podcasters. Upload a mix and it runs through a measured mastering chain of up to 16 stages: EQ, multiband and bus compression, harmonic exciter, analog warmth, console emulation, M/S processing, stereo width and 4x oversampled true-peak limiting. You hear a full before/after A/B preview before you pay anything. Every master gets a real-time score across 10 categories that explains what to fix in the mix, plus ITU-R BS.1770-4 loudness metering, LRA and true peak. Choose a loudness target for Spotify, Apple Music, YouTube, Tidal, Deezer, podcasts or vinyl-safe masters, then export WAV, FLAC, AAC or MP3 up to 32-bit/192 kHz. Studio adds stem separation, reference matching and album coherence. Pricing is pay-per-track from $14.99 with no subscription, and a mastering engineer option is available for hand-mastered releases.

About

Audible's ACX has eight technical checkpoints, and a file that misses one comes straight back. chapterpass masters each chapter file to spec: RMS loudness between -23 and -18 dBFS, peaks held below -3 dBFS, a noise floor under -60 dBFS RMS, room tone at the head and tail, and a 192 kbps CBR MP3 on the way out. Every output is verified against the full spec before download, and you see the measured value next to the requirement for each checkpoint. The processing runs in your browser through WebAssembly, so your audio never leaves your device. There is no account to create. Your first file is free, then $36 per finished hour, $27 from 5 hours, $18 from 10 hours, billed by the second. A free measurement page at /free-acx-check reads your loudness, peak, noise floor and silence padding against the spec without mastering anything. chapterpass masters the measurable technical specs. It does not edit your recording, remove noise, or fix narration.

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Supported
On-Premises Supported
iPhone Supported
iPad Supported
Android Supported
Chromebook Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Independent musicians, producers, beatmakers and podcasters who want release-ready masters for Spotify, Apple Music and other platforms without booking a studio or paying for a subscription.

Audience

Audiobook narrators, indie authors narrating their own books, audiobook producers and post-production studios preparing files for Audible ACX

Support

Phone Support Supported
24/7 Live Support Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Not Supported

Screenshots and Videos

No images available

Screenshots and Videos

No images available

Pricing

$14.99
Free Version Supported
Free Trial Not Supported

Pricing

$36 per finished hour
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

LuvLang.studio
Founded: 2024
United States
luvlang.studio

Company Information

chapterpass
Founded: 2026
Italy
chapterpass.com

Alternatives

No Alternatives

Alternatives

Loudness

Loudness

Loudness.fm
Elevate

Elevate

Newfangled Audio

Categories

Audio Mastering Supported

Categories

Audio Mastering Supported

Integrations

No info available.

Integrations

No info available.
Claim LuvLang.studio and update features and information
Claim LuvLang.studio and update features and information
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Claim chapterpass and update features and information