Windows Media Audio Lossless (WMA Lossless) is an audio codec developed by Microsoft. It's designed for lossless audio compression, meaning it compresses audio data without discarding any information. This results in larger file sizes compared to lossy formats like MP3 or AAC, but it preserves the original audio quality perfectly. WMA Lossless is often used for archiving audio, creating backups of CDs, or for audiophiles who prioritize sound quality over file size. The format supports multi-channel audio and high-resolution audio, making it suitable for a wide range of audio applications. While WMA Lossless offers excellent audio fidelity, its compatibility is somewhat limited compared to more widely adopted lossless formats like FLAC. It's primarily supported by Microsoft products and some third-party software. When choosing between lossless formats, consider the balance between audio quality, file size, and compatibility with your devices and software.