WAV ⇄ FLAC Converter

Key Features

• WAV → FLAC conversion
• FLAC → WAV conversion
• Metadata preservation (title, artist, album, date, genre, track number, comment, album artist, composer)
• Cover art preservation
• Original sampling rate preserved
• Automatic bit depth detection (16bit/24bit/32bit)
• Drag & drop support (files and folders)
• Batch processing of all WAV/FLAC files in a folder (excluding subfolders)

Distribution Files

• wav_flac_converter.exe
• wav_flac_converter_readme.html
• wav_flac_converter_readme_en.html

System Requirements

• OS: Windows 10 / 11 (64-bit)
• FFmpeg: Required for 32-bit FLAC conversion (not needed for 16bit/24bit FLAC)
  • Download from FFmpeg official site
  • Must be registered in PATH environment variable

How to Use

1. Drag and drop WAV/FLAC files or folders containing them onto wav_flac_converter.exe (or its shortcut)
2. Converted files will be created in the same folder as the original files
3. Multiple files and folders can be dropped at once
4. When dropping a folder, only WAV/FLAC files in that folder will be processed (subfolders excluded)

Conversion Details

WAV → FLAC Conversion

• Compression level: 0.625 (FLAC standard compression ratio)
• Bit depth: Maintains original WAV bit depth (16bit/24bit/32bit)
• Metadata: Reads from RIFF INFO chunks and ID3v2 tags, converts to FLAC tags
• Cover art: Extracts from embedded ID3v2 images in WAV or image files in the same folder

FLAC → WAV Conversion

• Bit depth: Maintains original FLAC bit depth (16bit/24bit/32bit float)
• Metadata: Reads FLAC tags and writes ID3v2.3 tags only (RIFF INFO chunks are NOT written)
• Cover art: Embeds FLAC cover art into WAV ID3v2 tags
• 32bit FLAC: Automatically uses FFmpeg when soundfile library cannot handle the format

Supported Metadata

Metadata Field	FLAC Tag	WAV (ID3v2.3)
Title	title	TIT2
Artist	artist	TPE1
Album	album	TALB
Date	date	TDRC
Genre	genre	TCON
Track Number	tracknumber	TRCK
Comment	comment	COMM
Album Artist	albumartist	TPE2
Composer	composer	TCOM

Output Filename

• Default: original_filename.new_extension
• If file exists: original_filename_converted.new_extension

Error Handling

• If a file is not found, an error message will be displayed for that file
• Unsupported file formats will be skipped
• If an error occurs during conversion, the error message will be shown and processing will continue with the next file

Technical Specifications

Conversion Method

• Completely lossless conversion: PCM data is directly transferred with no quality degradation
• Bit depth preservation: 16bit/24bit/32bit float are fully maintained
• Sampling rate preservation: No resampling (44.1kHz, 48kHz, 96kHz, etc. are preserved as-is)
• Libraries used:
  • soundfile: Audio data reading and writing
  • mutagen: Metadata reading and writing
  • FFmpeg: Fallback for 32bit FLAC conversion

WAV File Metadata Structure

• ID3v2.3 tags: Format used by this tool. Supports cover art embedding
• RIFF INFO chunks: Not used by this tool (read-only support)

FLAC File Metadata Structure

• Vorbis Comments: FLAC standard metadata format
• Picture block: Cover art image embedding

Limitations

• Supported formats: WAV and FLAC only
• When dropping a folder, files in subfolders will not be processed
• Metadata encoding is UTF-8
• Cover art image formats supported: JPEG and PNG
• FFmpeg is required for 32bit FLAC conversion (not needed for 16bit/24bit)

License

This tool is free to use and modify.