Sony Vegas Pro is a video editing software package for non-linear editing systems (NLE) originally published by Sonic Foundry, now owned and run by Sony Creative Software. Originally developed as an audio editor, it eventually developed into an NLE for video and audio from version 2.0. Vegas features real-time multitrack video and audio editing on unlimited tracks, resolution-independent video sequencing, complex effects and compositing tools, 24-bit/192 kHz audio support, VST and DirectX plug-in effect support, and Dolby Digital surround sound mixing. Up to version 10, Vegas Pro runs on Microsoft Windows XP (32-bit only), Vista and 7 (both 32- and 64-bit editions). Version 11 dropped support for Windows XP.