R128x Loudness Measuring Tool
Supports batch measuring.
$9.99
This is a useful utility in audio production industry.
r128x is a utility app for batch-measuring loudness of audio files which formats are supported* by the current version of the CoreAudio framework shipped in macOS and iOS.
This is a useful utility in audio production industry. Some scenarios for example:
- If you are a MIDI composer asking for someone else to help you mix the tracks, you need to make sure the loudness and the max dB-to-top of all tracks are in the safe range.
- Mastering engineers can use this tool to see whether an album shares the same loudness range among all of its tracks.
- Especially, this app allows you to immediately audition the 3-second part around the first dBTP location by tapping / clicking a measured track. You may also use the up / down arrow key on your keyboard to navigate among measured tracks and hit the space key to do the same audition action.
P.S.: The supported formats include MOV, MP4, MP3, MP2, M4A (iTunes Plus), WAV, AIF, OGG, AIFF, CAF, ALAC, SD2, AC3, FLAC.
The App Store version of this app charge fees as a compensation to the cost of the Apple Developer Program fee. Individuals who disagree with this can use Xcode to build the app by themselves using the code repository of this app (released for free under GPLv3 license): https://github.com/ShikiSuen/r128x
Following 3rd-party open-source components are used in this app:
https://github.com/jiixyj/libebur128
P.S.: The Japanese and Chinese titles of the app are "百二十八禁", but this is an all-ages app.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, 立剑 孙, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 立剑 孙
- Size
- 3.3 MB
- Category
- Music
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 9 more
- English, French, German, Japanese, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish
- Age Rating
4+
- 4+
- Copyright
- © (c) 2012 and onwards Manuel Naudin (audionuma); (c) 2023 and onwards Shiki Suen (only the forked SwiftUI frontend.)

