VSL Special Edition Vol. 4, Virtual orchestra (download), Contains special winds & choir with 15 wind instruments not included in Special Edition Volumes 1-3 as well as the most important articulations of the Vienna Choir, Comprehensive supplementary library with woodwinds and brass instruments as well as supplementary choirs, Contain all basic articulations and legato transitions, Vienna Instrument Playback Software with Intelligent Play Style Recognition@+*Specifications:*@+@+, Supported formats: VST2 / AU / AAXnative, System requirements: Minimum Win7 or higher, Mac OSX 10.10 or higher, Intel Core 2 Duo CPU, 4 GB RAM, 19 GB HD, Internet connection, Vienna Key (Article Nr. #193306# - not included in delivery)