The way we consume music has undergone a significant transformation over the past few decades. From the introduction of CDs to the rise of digital music formats, the music industry has continually adapted to new technologies and consumer behaviors. One pivotal moment in this evolution was the launch of iTunes by Apple in 2003, which revolutionized the way people bought and managed their music libraries. A key component of this revolution was the use of AAC (Advanced Audio Coding) and M4A (MPEG 4 Audio) files, formats that offered high-quality audio at compressed sizes, making digital music more accessible and convenient. Before iTunes, music was primarily distributed in physical formats such as vinyl records, CDs, and cassette tapes. The shift to digital music began with the emergence of MP3s and the proliferation of file-sharing platforms like Napster. However, these early digital formats were often associated with low-quality audio and copyright infringement issues.