The recording cutter head forms a tangent with all parts of the record groove by moving across the disc in a straight line, whereas the reproducing pickup traverses it in an arc. The axis of motion of the stylus is thus different to that of the cutter over a large portion of the disc surface. This is lateral tracking error, which produces second harmonic and intermodulation distortion.
"The CD labelling was professionally printed and adhered securely to the disc. It was fantastic hearing those old songs. Immediately my thoughts were filled with memories of times long past. I am looking forward to sharing this music with my children."
