Sibelius' main function is to help create, edit and print musical scores. It supports virtually all music notations, enabling even the most complex of modern orchestral, choral, jazz, pop, folk, rock and chamber music scores to be engraved to publication quality. Further, it allows scores to be played back or turned into MIDI or audio files, e.g. to create a CD. A built-in sample player and a large range of sampled sounds are included. Sibelius supports any MIDI device, and allows Virtual Studio Technology (VST) and Audio Units plug-ins to be used as playback instruments, giving users access to third-party sample libraries. Score playback can also be synchronised to video, or to DAW software via the ReWire standard.