1To get started, select the .aac files you want to convert and add them to the converter.
2Next, use the conversion settings and click the "Convert" button.
3That's all! Now you can download the converted .m4a files.
AAC
AAC (Advanced Audio Coding)
AAC is an audio coding format that uses lossy compression. As well as other lossy formats, AAC cuts off human-inaudible frequencies to reduce file size. It was developed by Apple as an alternative to other popular lossy formats and is used for streaming and storing music in iTunes. This codec is part of the MPEG-4 container. AAC demonstrates high efficiency at variable and constant bitrate.
File type: Audio
File extension: .aac
Developed by: Dolby, Sony, Nokia, Panasonic, etc
Initial release: 1997
M4A
M4A (MPEG-4 Part 14)
The M4A music format was developed by Apple. This is the format used to store audio files on the iTunes Store platform. This format is a kind of MPEG-4 container but designed specifically for encoding music. The M4A format can use both lossless and lossy compression using AAC (Advanced Audio Coding) or ALAC (Apple Lossless Audio Codec) technologies.