WMA to M4A
M4P to M4A
MP4 to M4A
AAC to M4A
RAX to M4A
AA to M4A
Convert AAC to M4A - AAC to M4A Converter
To use DRM Converter - DRM Remover Software as AAC to M4A converter, select MPEG4 AAC from "Encoder" drop-down list and set a desired MPEG4 AAC quality parameter in "Compression Quality" drop-down list in DRM Converter's Settings. Select AAC files for conversion using the "Select Files" button in DRM Converter's main window toolbar (you can use Ctrl or Shift to select two or more files) or using drag&drop (for example from the Windows Explorer). Also you can drag&drop a folder with files or a folder structure. You will see all selected AAC files in the DRM Converter's main window. To delete a AAC file from this list, select it and click on the "Delete" button in DRM Converter's main window toolbar. Once the AAC files are present in your list, click the "Convert" button to convert AAC to M4A.
Since MPEG-4 is a container format, MP4 files may contain any number of audio, video, and even subtitle streams, making it impossible to determine the type of streams in an MP4 file based on its filename extension alone. In response, Apple Inc. started using and popularizing the M4A file extension using for audio-only MP4 files.
Advanced Audio Coding (AAC) is a standardized, lossy compression and encoding scheme for digital audio. AAC usually achieves better sound quality than the more popular MP3 format when compared at the same bitrate, especially for bitrates below about 100 kbit/s. It is the default, and most commonly used format for compressing audio CDs for Apple's iPod and iTunes (extension .M4A). Apple uses the AAC format for all audio for sale on the iTunes Store and a special proprietary .M4P container for Digital Rights Management (DRM) restricted files.