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Description
Audible's ACX outlines a total of eight technical standards, and any file that fails to meet even one of them is promptly rejected. Chapterpass meticulously prepares each chapter file to comply with these specifications, ensuring RMS loudness is maintained between -23 and -18 dBFS, peaks are capped at below -3 dBFS, the noise floor is under -60 dBFS RMS, and room tone is present at both the beginning and end, all while outputting a 192 kbps CBR MP3. Every file is reviewed for compliance with the complete specifications before it is made available for download, and users can see the actual measurements aligned with each requirement for all checkpoints. The processing is conducted within the user's browser via WebAssembly technology, guaranteeing that the audio files remain on the user's device throughout the process. There is no need to set up an account to use the service; the first file is complimentary, with subsequent charges of $36 per finished hour, $27 for five or more hours, and $18 for ten or more hours, all billed by the second. Additionally, a free measurement tool can be accessed at /free-acx-check, which evaluates the loudness, peak levels, noise floor, and silence padding against the specifications without conducting any mastering. Chapterpass is dedicated to mastering the necessary technical standards, although it does not perform any editing, noise removal, or corrections to narration. This ensures a streamlined process for creators looking to comply with ACX requirements efficiently.
Description
Discover a rapid and user-friendly online mastering engine that delivers exceptional sound quality, crafted by Grammy-winning experts and enhanced by artificial intelligence. This innovative platform transforms your track into a louder, more vibrant, and well-defined piece of music. To get started, simply upload your MP3, AIFF, or WAV file using the button located at the top of the homepage. Once uploaded, your song will be sent to our advanced online server for mastering. Our state-of-the-art mastering application will meticulously analyze your audio and select the appropriate tools necessary to elevate your track, making it sound more powerful and dynamic than the original version. You can compare the mastered audio from eMastered with your initial file at no cost and easily download it as either a WAV or MP3 file with just one click. By subscribing to our plan, you gain the advantage of downloading an unlimited number of masters each month. The eMastered engine continually learns and evolves through machine learning, enhancing its capabilities with every track it processes. Much like a skilled human engineer, it creates a custom master that caters to the distinctive characteristics of each song, whether it be hip hop, EDM, or any other genre, ensuring a tailored listening experience for every user. Embrace the future of music mastering and let your creations shine like never before.
API Access
Has API
API Access
Has API
Screenshots View All
No images available
Integrations
No details available.
Integrations
No details available.
Pricing Details
$36 per finished hour
Free Trial
Free Version
Pricing Details
$19 per month
Free Trial
Free Version
Deployment
Web-Based
On-Premises
iPhone App
iPad App
Android App
Windows
Mac
Linux
Chromebook
Deployment
Web-Based
On-Premises
iPhone App
iPad App
Android App
Windows
Mac
Linux
Chromebook
Customer Support
Business Hours
Live Rep (24/7)
Online Support
Customer Support
Business Hours
Live Rep (24/7)
Online Support
Types of Training
Training Docs
Webinars
Live Training (Online)
In Person
Types of Training
Training Docs
Webinars
Live Training (Online)
In Person
Vendor Details
Company Name
chapterpass
Founded
2026
Country
Italy
Website
chapterpass.com
Vendor Details
Company Name
eMastered
Founded
2015
Country
United States
Website
emastered.com/en