mp4 Audio Extractor

• All of youtube music download services reencode the original .aac audio file before they let you download it, leading to a degradation of quality, even those that let you choose to download as aac/m4a.

• The only way to losslessly download music from youtube is to download the 720p .mp4 directly from youtube, and extract the .aac audio inside it.

• AAC is however not suitable for general use and it's preferable to leave it in .mp4 container like m4a.

• mp4 Audio Extractor will let you quickly and easily convert .mp4 audio+video into audio only .mp4, by removing the video, and never touching the audio. It will also rename the file to .m4a for convenience.

• mp4 Audio Extractor is frontend GUI for mp4box. While there are others, this one is designed to be as user-friendly and do its job in as little clicks as possible, supporting drag'n'drop and the like.