Closed-loop systems are able to correct in order to meet target results. Normally a sensor is used to look at the output and adjust the process accordingly. This is called feedback.
A file with an extension of .DAT is known as a Data (General). These .DAT files can be opened on Windows and Apple using programs ...
SACD. SACD (Super Audio Compact Disc) is a high resolution audio disc format developed by Sony and Philips (who also developed the CD). Utilizing the Direct Stream Digital (DSD) file format, SACD provides for more accurate sound reproduction than the Pulse Code Modulation (PCM) used in the current CD format.