Cassette to CD Recorder

Double layer (DL) media have two independent data layers separated by a semi-reflective layer. Both layers are accessible from the same side, but require the optics to change the laser's focus. Traditional particular layer (SL) writable electronic media are produced with a spiral groove molded in the conservational polycarbonate layer (not in the data recording layer), to direction and synchronize the speed of recording head.

Later CD drives kept the CLV paradigm, but evolved to Cassette to CD Recorder achieve cutting edge rotational speeds, popularly described in multiples of a indelicate speed. As a result, a 4X drive, for instance, would rotate at 800-2000 RPM, while tranferring data steadily at 600 KiB/s, which is duplicate to 4 x 150 KiB/s.