FLAC file format
A free codec developed for lossless compression of audio content that does not exclude information from the stream. It allows for listening to musical compositions with professional sound reproduction systems, as well as for track archiving. FLAC files are being played by portative audio players, supplied by the most of specialized programs, and are represented in huge variety of hardware implementations. They allow users to copy CD tracks without deterioration in sound quality.
Since streaming is being coded with an increased speed, FLAC files are often less than half of the original track. However, this does not affect the track quality, and therefore the format is popular for online translations and real-time coding. FLAC can support samples with a static point within the range of 4-32 bit per sample and sampling frequency of 655.3 KHz. If new fields arrive, decoders are not being affected.
In order to change FLAC format, one may use Sound Forge or Adobe Audition. In addition to that, some smartphones can easily work with such files.