On, Sony announced that Vegas was sold to MAGIX, which formed VEGAS Creative Software, to continue support and development of the software. The software was originally published by Sonic Foundry until May 2003, when Sony purchased Sonic Foundry and formed Sony Creative Software. Vegas Pro features real-time multitrack video and audio editing on unlimited tracks, resolution-independent video sequencing, complex effects, compositing tools, 24-bit/192 kHz audio support, VST and DirectX plug-in effect support, and Dolby Digital surround sound mixing. Originally developed as an non-linear audio editing app, it became a non-linear video and audio editor, starting from version 2.0. The software runs on Windows operating systems. The first release of Vegas Beta was on 11 June 1999. Vegas Pro (stylised as VEGAS Pro, also called Sony Vegas) is a video editing software package for non-linear editing (NLE).