A number of factors can affect the size of a sound file and the quality of its playback. These include the sample rate, sample resolution and the way that the file is compressed. A lossless audio file format is the best format for sound quality. These include FLAC, WAV, or AIFF. These types of files are considered “hi-res” because they are better or equal to CD-quality. The trade-off is that these files will be very large, due to these size redundancies Mp3 though giving a low output but in the optimum range when compared to the above formats is chosen the best one, MP3’s can be created in a variety of bit rates, which is used to balance the file’s quality and size. Their efficient size has made them the standard format to exchange audio on the Web.