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What is AAC?

AAC stands for advanced audio coding and is the logical successor to MP3 (ISO/MPEG Audio Layer-3) for audio coding at medium to high bit rates.

The idea of AAC's algorythm is to exploit two primary coding strategies to dramatically reduce the amount of data needed to convey high-quality digital audio. AAC has the sampling frequencies between 8 Hz and 96 kHz and any number of channels between 1 and 48. AAC uses the modified discrete cosine transform (MDCT) together with the increased window lengths of 2,048 points. AAC is much more capable of encoding audio with streams of complex pulses and square waves than MP3 or Musicam. AAC can be switched dynamically between MDCT block lengths of 2,048 points to 256 points.

AAC takes a modular approach to encoding. Depending on the complexity of the bitstream to be encoded, the desired performance and the acceptable output, implementers may create profiles to define which of a specific set of tools they want use for a particular application. So the AAC LD coding scheme bridges the gap between speech coding schemes and high quality audio coding schemes.

MP3 VS ACC, or The best music file format for mobile phones

Audio converter
  • AAC to MP3, WMA, WAV, APE
  • AAC to any smart phone
  • AAC to any cell phone
  • Add music to Archos, PSD, xBox
convert audio
Total Audio Converter supports the following conversions with AAC format files:
  • AAC to MP3
  • AAC to WMA
  • AAC to WAV
  • AAC to OGG
  • AAC to FLAC
  • AAC to AAC (change bitrate or frequency)
  • AAC to MP4
  • AAC to MPC
  • AAC to APE
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