Basic MP3 Toolkit – Readme (v0.1β)

Software Name: Basic MP3 Toolkit
Version: 0.1β
Supported OS: Windows 11
Type: Freeware (Donations Welcome)
Author: AlpsCreate
Website: http://alpscreate.s323.xrea.com
※ As this software is freeware, individual support is generally not provided.
　 For inquiries or donations, please refer to the website above.

Overview

Basic MP3 Toolkit is a collection of convenient tools for working with MP3 files.
It is designed to be intuitive and easy to use, even without reading a manual.
※ Currently includes Loudness Normalization and Recording PC Playback Audio (more features will be added over time).

How to Use

Extract the downloaded archive file (Basic_MP3_Toolkit.zip).
Place the extracted Basic MP3 Toolkit folder anywhere you like.
Run Basic MP3 Toolkit.exe inside the folder to start the application.

Feature Guide: Loudness Normalization

・Adjusts the loudness of MP3 files to bring them as close as possible to the Target Loudness, without degrading audio quality.
・Loudness adjustment is performed by modifying the MP3 frame’s global_gain value (a 256‑step volume coefficient). Unless the change is extremely large, the original state can be restored later.
・Each global_gain step changes the volume by approximately 1.5 dB. Any remaining fractional adjustment is written into the ID3v2 tag as a ReplayGain value.
（This differs from the original ReplayGain definition, which is a correction value for playback at 89 dB.）
・Typical Target Loudness values range from –14 LUFS to –24 LUFS, depending on playback environment and audio type. Please adjust according to your preference.
・If the resulting Peak exceeds 1.0, clipping will occur. In that case, lower the Target Loudness. (By default, the Target Loudness is automatically corrected to prevent peaks above 1.0.)
・Adjusted files are saved in the global_gain adjusted and global_gain restored subfolders. The displayed adjustment results are not written to the original file. To re-display the original file’s information, reload the file or press F5 (unless Overwrite Original File (Unsafe) was selected).

Uninstallation

To uninstall the software, simply delete the Basic MP3 Toolkit folder.

The application also creates a settings folder at the following location:

%AppData%\AlpsCreate\Basic MP3 Toolkit

If you do not need these settings, you may delete this folder as well.
(You can access it directly by pasting the path into the Explorer address bar.)

System Requirements

.NET 10 Runtime must be installed.

Open Source Software Used

Basic MP3 Toolkit uses the following open-source software:

NAudio

Version: 2.3.0
Copyright: (c) Mark Heath
License: MIT License
Project URL: https://github.com/naudio/NAudio

NAudio.Lame

Version: 2.1.0
Copyright: (c) Coreyford
License: MIT License
Project URL: https://github.com/Corey-M/NAudio.Lame

TagLibSharp

Version: 2.3.0
Copyright: (c) Brian Nickel, Gabriel Burt, and others
License: GNU Lesser General Public License v2.1 (LGPL-2.1)
Project URL: https://github.com/mono/taglib-sharp

Revision History

Ver 0.1β (2026/10/15)
・Initial release

Software License Agreement

AlpsCreate (“the Licensor”) grants permission to use this software (“the Software”) under the following terms:

1. Restrictions

Users may not:

Copy the Software for purposes other than backup
Modify, reverse engineer, decompile, or disassemble the Software
Sell, rent, redistribute, or include the Software in books or media without permission

2. Disclaimer

The Software is provided “as is,” without any warranty regarding quality, functionality, or fitness for a particular purpose.
The Licensor assumes no responsibility for any damages arising from the use of the Software.
The Licensor is not obligated to provide updates or bug fixes.

3. Copyright

4. Other Terms

If any part of this agreement is deemed invalid by law, the remaining provisions shall continue in effect.
Company names and product names mentioned herein are trademarks or registered trademarks of their respective owners.