pydub

Pydub is a Python library that provides a high-level, intuitive interface for audio manipulation. It allows users to open, edit, and save audio files in various formats (WAV, MP3, OGG, FLV, etc.) using ffmpeg or libav as a backend. Key features include slicing audio by milliseconds, adjusting volume, concatenating clips with optional crossfades, repeating segments, applying fades, and exporting with metadata tags or custom ffmpeg parameters. AudioSegment objects are immutable, ensuring safe operations. The library is easy to install via pip and requires ffmpeg or libav for non-WAV formats. It also supports playback through simpleaudio, pyaudio, or ffplay. The README provides quickstart examples, debugging tips, and use cases like batch converting videos to MP3 or creating playlists with crossfades.