<![CDATA[The process of data compression based on the fact that in almost all types of data are always there repetition in the data component has, for example, in a text sentence there will be redundancies letter alphabet of letters ܽ through ݖ. Compression of data through the encoding process seeks to eliminate the element of repetition by changing it such that the data size becomes smaller. In this study, an audio file compression applications is making by using Arithmetic Coding algorithm. Unified Modelling Language (UML) is used as system development tools. In making this application is emphasized to compress the audio file extension * .wav. Compression application testing is done by examining the files that have different sizes with a sample rate and bitrate values are the same. It was concluded that the audio file with a large size takes longer to perform the compression process. The compressed audio files can not be executed before passing the decompression process that caused a change in the structure of the current audio file decompression process. Keywords—Compression, File Audio, Arithmetic Coding]]>
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