The WMA file format stands for ‘Windows Media Audio’. Microsoft developed this format to compete against the rapidly growing more popular mp3 format. WMA is intended primarily for streaming at low bandwidths. A big difference with other formats such as MP3 and OGG is the potential use of DRM. DRM is a controversial technique that limits the possibilities for users to copy, edit, and open etc. the file due to copyrights. Mime type: audio/x-ms-wma, video/x-ms-asf.