The current variant is specified in ISO/IEC standard 14496-3. It is also part of the MPEG-4 standard, it is most widely used to create small digital audio files. It too compresses digital audio files but to a bigger degree. Apple are the biggest users of this format and if you have an iPod or iPhone then you will have come across this format as it is iTunes default audio format.ĪAC is similar in concept to MP3 but goes further. It is at least one tenth the size of CD digital data. AAC is about half the size of MP3 but with better quality. It essentially cuts out, or compresses, information that the human ear cannot pick up thereby making digital files smaller and more easily managed and therefore quicker to download. VLC media player, MPlayer, Winamp, foobar2000.AAC is similar to MP3. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11 the size of the CD file created from the original audio source.įoobar2000, AIMP, DirectShow, QuickTime, VLC media player. The use of lossy compression is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio. The quality for stereo is satisfactory to modest requirements at 96 kbit/s in joint stereo mode however, hi-fi transparency demands data rates of at least 128 kbit/s. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players.ĪAC supports inclusion of 48 full-bandwidth audio channels in one stream plus 16 low frequency effects channels, up to 16 "coupling" or dialog channels, and up to 16 data streams. MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. AAC has been standardized by ISO and IEC, as part of the MPEG-2 and MPEG-4 specifications. Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at similar bit rates. Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression.
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