A new approach to the automatic detection of pressing faults on gramophone records

The problems associated with the quality control of gramophone records and the current methods of automatic detection of faults are reviewed. The need for a new fault detection strategy is shown and a method based on Syntactic String Analysis (SSA) for detecting impulsive noises embedded in music programme is discussed. An experimental equipment for detecting defects in gramophone records is described which utilizes SSA as the primary fault detection process, together with microcomputer based fault classification and assessment. Results from the equipment are presented and compared with those from the current quality control equipment.