This document integrates many different types of audio coding: natural sound with synthetic sound, low bitrate
delivery with high-quality delivery, speech with music, complex soundtracks with simple ones, and traditional
content with interactive and virtual-reality content. This document standardizes individually sophisticated
coding tools to provide a novel, flexible framework for audio synchronization, mixing, and downloaded postproduction.
This document does not target a single application such as real-time telephony or high-quality audio
compression. Rather, it applies to every application requiring the use of advanced sound compression,
synthesis, manipulation, or playback. This document specifies the state-of-the-art coding tools in several
domains. As the tools it defines are integrated with the rest of the ISO/IEC 14496 series, exciting new
possibilities for object-based audio coding, interactive presentation, dynamic soundtracks, and other sorts of
new media, are enabled.