 .cda file

.cda is a common filename extension denoting a small (44 byte) stub file generated by Microsoft Windows for each audio track on a standard "Red Book" CD-DA format audio CD as defined by the Table of Contents (ToC) (within the lead-in's subcode).These files are shown in the directory for the CD being viewed in the format "Track##.cda", where ## is the number of each individual track.