Adaptive Transform Acoustic Coding（ATRAC，自适应听觉转换编码）为Sony公司于1992年所开发之音频有损数据压缩技术，也是相关技术名词之总称。除了Sony本身，其他MiniDisc制造商如Sharp、Panasonic等，也有各自研发自家的ATRAC编解码器。

Sony在2007年9月11日发布的Walkman,S600F/S700F系列继续支持SonicStage和ATRAC音频格式而Sony对次决定解释为"为了考虑到各个地区的市场特性，所作出的规格决定。"

Adaptive Transform Acoustic Coding (ATRAC) is a family of proprietary audio compression algorithms developed by Sony. MiniDisc was the first commercial product to incorporate ATRAC in 1992. ATRAC allowed a relatively small disc like MiniDisc to have the same running time as CD while storing audio information with minimal loss in pe****tible quality. Improvements to the codec in the form of ATRAC3, ATRAC3plus, and ATRAC Advanced Lossless followed in 1999, 2002, and 2006 respectively.