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The difference in the recording process for a commercially bought Cd compared to one you burn on my own PC.
A factory manufactured CD is recorded by literally pressing the data onto the disc. The information is moulded onto the disc’s inner surface and this is read by the laser in whichever CD playing device you use.
A computer’s CD drive, meanwhile, uses heat, not pressure, to record the information onto a blank CD. The recordable CD contains a dye coating which when exposed to heat changes colour or reflectivity. These subtle changes, imperceptible to the human eye, are read as data by a CD player.
The two processes explains why a factory-pressed CD, handling with care, seems to last forever and a CD-R or CD-RW can often become unreadable after as little as two to five years. Life expectancy of a PC burnt CD depends on a range of factors including the type of dye used on the CD, whether it is a recordable CD-R or the less stable re-recordable CD-RW type, how the CD is stored and handled, and the quality and recording speed of the CD drive.
Many more tips are in the Home Recording Studio Guide.
Keep On,
Jim Koblick
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