OSS provides sound card drivers for most popular sound cards under Linux, *BSD, Solaris, UnixWare, OpenServer, AIX, HPUX, LynxOS, VxWorks, and Tru64. These drivers support digital audio, MIDI, synthesizers, and mixers found on sound cards. These sound drivers comply with the Open Sound System API specification. OSS provides a user-friendly GUI which makes the installation of sound drivers and configuration of sound cards very simple. It supports over 200 brand name sound cards, and provides automatic sound card detection, Plug-n-Play support, support for PCI audio soundcards, and support for full duplex audio.