The Windows Phone version of VLC has been updated adding m4a support so you can play your Apple formatted music files and there are a few nice minor improvements. There are new gestures and keyboard controls, better hardware acceleration and support for chapters.
VLC is a great all round media player available from the Windows Store and well worth adding to your collection.
Here are the full release notes:
Changes between 1.6.2 and 1.7.0
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Release: 15 September 2015
Core:
* Rewrite of the thumbnailer process
* Speed up of the video decoding and output, and removing deadlocks
* Support of acceleration activation per-file
* Faster input support
Application:
* Support of m4a files
* New gestures and keyboard controls
* Control of audio/video/subtitle delay and synchronization
* Better hardware acceleration
* Support for chapters control
* Support of a light and black theme
* Important interface update to prepare for Windows 10
* Fix support for SRT and SSA
* New mini player design and widget
* Fix support for Windows RT