WAV to CD Format Converter

Version 1.0

Overview

WAV to CD Format Converter is a dedicated tool for converting various WAV file formats to the music CD standard format (44.1kHz/16bit). High-quality resampling and dithering processes minimize audio quality degradation during conversion.

Key Features

CD Standard Conversion: Converts any sampling rate/bit depth to 44.1kHz/16bit
High-Quality Processing: Highest quality resampling using librosa Kaiser method
Dithering: Reduces quantization noise with TPDF triangular dithering
Metadata Preservation: Preserves tag information from original files whenever possible
Parallel Processing: Efficiently processes multiple files simultaneously
Smart Skip: Automatically skips files already in CD format

System Requirements

Windows 11 (64-bit) English version
Also compatible with Windows 10 (64-bit) English version

How to Use

Basic Usage

Prepare the WAV files you want to convert
Drag and drop WAV files onto wav_to_cd_format.exe
Processing starts automatically
After conversion, an output_cd44 folder is created in the same location as the original files
Converted files are saved with the naming pattern original_filename_cd.wav

Processing Entire Folders

Drag and drop a folder containing WAV files onto wav_to_cd_format.exe
All WAV files in the folder will be processed in batch

Tip: You can drag and drop multiple files or folders simultaneously.

Processing Details

Conversion Specifications

Item	Specification
Output Sampling Rate	44.1kHz (44,100Hz)
Output Bit Depth	16bit PCM
Resampling Method	librosa Kaiser (highest quality)
Dithering Method	TPDF Triangular Dithering
Parallel Processing	4 threads

Processing Flow

File Verification: Checks the format of input files
Skip Determination: Skips if already 44.1kHz/16bit
Resampling: High-quality resampling if sampling rate is not 44.1kHz
Bit Depth Conversion: Applies dithering when converting to 16bit
File Saving: Saves as CD standard WAV file
Metadata Copying: Copies tag information to new file whenever possible

About Output Files

Output Destination

Converted files are saved in the output_cd44 folder, which is automatically created in the same folder as the original files.

File Names

Output file names follow the pattern "original_filename_cd.wav".
Example: mysong.wav → mysong_cd.wav

Note: Original files are not overwritten. Original files remain after conversion.

Understanding Processing Results

During processing, the command window displays the following information:

[CONVERT]: File has been converted
[SKIP]: Conversion skipped as file is already in CD format
[ERROR]: An error has occurred

After processing completion, the following statistics are displayed:

Number of converted files
Number of skipped files (already in CD format)
Number of files with errors
Output folder path

Frequently Asked Questions

Q1: What types of WAV files are supported?

A: General WAV files (PCM format) are supported. Sampling rate and bit depth are not restricted. Examples: 48kHz/24bit, 96kHz/32bit, 192kHz/24bit, etc.

Q2: What happens to files already at 44.1kHz/16bit?

A: Conversion processing is skipped, but the file is renamed to "original_filename_cd.wav" and copied to the output_cd44 folder. This ensures all processed files are in the same folder. The processing result displays "SKIP".

Q3: Will audio quality be degraded?

A: High-quality resampling algorithms and dithering processes minimize audio quality degradation. However, when the sampling rate or bit depth is reduced from the original file, the theoretical amount of information decreases.

Q4: Are stereo/mono files supported?

A: Yes, both are supported. Multi-channel files (such as 5.1ch) can also be processed.

Q5: How long does processing take?

A: This varies depending on file size and original sampling rate. As a guideline, a 5-minute track (96kHz/24bit) typically takes several tens of seconds to process.

Q6: Is metadata (tag information) preserved?

A: It is preserved whenever possible. However, since WAV file tag formats are not standardized, some tag information may not be copyable.

Q7: What if an error occurs?

A: An error message will be displayed. Common causes include file corruption, unsupported formats, and insufficient disk space.

Precautions

This tool is for WAV files only. Other formats such as MP3 or FLAC are not supported
If file or folder names contain invalid characters (\/:*?"<>|), errors may occur
Do not close the window during processing
When processing large numbers of files, ensure sufficient disk space is available
Original files are not deleted, but we recommend backing them up just in case

Troubleshooting

Program won't start

Verify you are running on Windows 11/10 (64-bit)
Check that the exe file is not corrupted

Can't find converted files

Check if the output_cd44 folder has been created in the same folder as the original files
Check the output path in the processing result message

Audio doesn't play correctly

Verify that the original file plays correctly
Check in a media player that the converted file is correctly in CD format (44.1kHz/16bit)

Technical Information

Libraries Used

soundfile: WAV file reading and writing
librosa: High-quality resampling
numpy: Numerical processing of audio data
mutagen: Metadata processing (optional)

About Dithering

This tool uses TPDF (Triangular Probability Density Function) triangular dithering when reducing bit depth. This converts quantization noise into noise that is less perceptible to the ear, minimizing audio quality degradation.

License and Disclaimer

This software is free to use for both personal and commercial purposes.

The author assumes no responsibility for any damages arising from the use of this software. Use at your own risk.

Update History

Version 1.0 - Initial release