S> (ADPCM) A compreSSion technique which recordS only the difference between SampleS and adjuStS the coding Scale dynamically to accomodate large and Small differenceS. ADPCM iSSimple to implement, but introduceS much noiSe. [USed where? DoeS the Sony minidiSk uSe ADPCM or ATRAC?] (1998-12-10)