Direct Stream Transfer is a lossless compression technique for compressing DSD audio data. DST is the standard lossless compression method for Super Audio CD content. Direct-Stream Digital (DSD) is an encoding technology to store audio signals on digital storage media and is used for the super audio compact disc (SACD). ... Super Audio CD (SACD) is a read-only optical audio disc aimed at providing higher fidelity digital audio reproduction than the compact disc. ...