Key BPM Renamer

key_bpm_renamer is a Python command-line tool that automatically analyzes audio files (MP3, WAV, FLAC), extracts the musical key and beats per minute (BPM), renames the files with this information, and embeds the key and BPM into the metadata (for MP3 files).

Features

• Extracts the musical key and BPM from audio files.
• Renames the audio files by appending the detected key and BPM.
• Embeds the key and BPM in the metadata of MP3 files (using eyed3).
• Supports MP3, WAV, and FLAC audio formats.
• Works with directories and preserves folder structure.

Installation

To install key_bpm_renamer, you can use pip:

pip install key_bpm_renamer

Usage

After installing the dependencies, you can use the key_bpm_renamer command to process your audio files.

Command Structure

key_bpm_renamer -i <input_directory> -o <output_directory>

-i <input_directory>: The path to the directory containing the audio files you want to process. -o <output_directory>: The path to the directory where the renamed audio files will be saved.

Example

key_bpm_renamer -i ./input_audio_files -o ./output_audio_files

This command will:

1. Analyze all the audio files in the input_audio_files directory.
2. Detect the key and BPM of each file.
3. Rename the files with the format <original_filename>_<key>_<bpm>bpm.<extension>.
4. Save the renamed files in the output_audio_files directory.
5. Embed the detected key and BPM into the metadata of each audio file.

Notes

• Supported audio formats: .mp3, .wav, .flac
• The key will be extracted using Essentia’s KeyExtractor and the BPM using RhythmExtractor.
• Files are copied (not moved), so the original files remain untouched.