What is TTA?
Audio format descriptionTTA, which stands for The True Audio, is a lossless audio codec. It is a free and open-sourced real time coding/encoding algorithm based on adaptive prognostic filters, which can be compiled and run on several different platforms.
TTA is a lossless audio codec, which means that when data is compressed, no data or quality is lost. When decompressed, the audio quality is exactly the same as the original. TTA performs this compression on multichannel 8, 16, and 24 bit data of the WAV audio files. The compression ratios for TTA range from 30% to 70%, depending on the type of the music being compressed.
TTA is an audio format that supports both ID3v1 and ID3v2 information tags. ID3 is a format that allows tags with information to be stored in an MP3 file. An ID3v1 tag occupies 128 bytes of space at the end of the file that contains metadata such as the title, artist, album, track number etc, while ID3v2 has much longer fields to allow more information such as lyrics and images to be stored. Using the TTA codec, music of up to 20 audio CDs can be stored on a single DVD-R, keeping all the CD information in the ID3 information tags.
The TTA format has a simple structure, with the header containing a unique format identifier followed by two meta-data blocks. The first block contains information needed for restoring the original stream; and the second contains the seek points table, each seek point containing 4 bytes of current frame data.
TTA has been designed to have minimal hardware requirements, and is presently the only lossless audio codec that has the capacity of real time hardware encoding. It offers the best performance of any of the lossless codecs that support hardware playback.
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