Advanced Audio Coding

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  • An international standard approved by the ISO
  • Flexible: supports several sampling rates (8000-96000 Hz), bit depths, and multichannel (up to 48 channels)
  • Several implementations, including a free and high quality one (iTunes)
  • Reaches transparency in most samples and for most users at around 150kbps
  • Part of MPEG-4 specs
  • Anyone can create its own implementation (specifications and demo sources available)
  • Some portable players support it (Philips Expanium, Apple iPod, cell phones from Nokia)