A type of symmetrical variable area sound track recognizable by the fact that in the print the central axis and surrounding modulated area are transparent, whereas as in the duplex type they are opaque.
"I am truly amazed at how good this CD sounds. With signal to noise ratio as bad as it was, I am extremely impressed with how good this CD sounds. I know you spent more than only 5 minutes per track and I really appreciate the extra time you took on this record album. I can't tell you how much this record means to me and the wonderful ..."