Most digital music is compressed to save space. The standard for years was MP3. However, Apple adopted AAC (Advanced Audio Coding) , wrapped in an .m4a container. Technically, AAC provides better sound quality than MP3 at the same bit rate.
But where do you find legitimate today? With the shutdown of the permanent download store on many platforms, the ecosystem has changed. This article provides a deep dive into what iTunes Plus is, why it matters, and the safest sites to acquire these files in 2024 and beyond. Itunes Plus Aac M4a Sites
: For the best results, convert from a lossless source like a CD or ALAC file. Converting from another "lossy" format (like an MP3) to AAC can cause a noticeable drop in sound quality [12, 14]. Mastered for iTunes : Professional creators should use 24-bit lossless files Most digital music is compressed to save space