An LRC file is a text-based file format specifically designed to synchronize song lyrics with an audio file, such as an MP3, FLAC, or WAV. It contains the plain text of the lyrics along with specific time tags, usually in the format [mm:ss.xx], which instruct a media player exactly when to display each line of text during audio playback. This format was originally popularized by software like Winamp and various hardware-based MP3 players in the late 1990s and early 2000s. There are two primary types of LRC files: simple LRC, which provides line-by-line synchronization, and enhanced LRC, which can provide word-by-word synchronization for more precise karaoke-style displays. Because they are essentially plain text files, they can be opened, read, and edited in any basic text editor like Notepad or TextEdit. They are widely utilized in karaoke applications, mobile music players, and modern streaming services to provide a dynamic 'sing-along' experience. To function correctly, the LRC file usually shares the exact same filename as the audio track it accompanies and is stored in the same directory, allowing the media player to automatically locate and load the lyrics. This synchronization allows for a dynamic user interface where lyrics scroll in real-time as the music progresses, making it an essential format for digital music enthusiasts and karaoke fans worldwide.