A few initial pressings are first made and sound checked. Faults common to all must be due to an earlier process. Only when all are traced and rectified is production started. Each disc is visually inspected after pressing, but some clicks and pops can get by.
"Thank you for your quick and excellent transfer from a 40-year-old Music LP with scratches, to an almost perfect recording on CD. YOU GUYS DO MAGIC! (And thanks for the care you gave my LP)"