If you avoid copyrighted materials, these five free audio editors that allow you to edit your M4A files with little to no trouble.
That means no editing of an audio file you downloaded from the iTunes store. Most of these programs do not support copyrighted M4A files.
However, you must be careful to edit only non-copyright protected audio files. As M4A is designed for working on Apple software, many audio editor seems difficulty to handle this audio format. As one high-quality audio format, M4A is compatible with Apple software. Since 2007, Apple sold their audio file on iTunes as M4A file. Top 6 M4A Audio Editor (Free & Paid) to Edit M4A Files as a Pro
