An .m4a file is an audio-only container format most commonly associated with devices and iTunes. It generally uses the Advanced Audio Coding (AAC) codec, which is often considered the "successor" to MP3.
by artists like Wilson Phillips, Justin Bieber, Alabama Shakes, or Adele. 01 Hold On m4a
: While standard on Apple products and mobile devices, it has historically seen less "mainstream" success on some legacy Windows applications or older car stereos compared to the universal MP3. 01 Hold On m4a