Can listening tests evaluate CD disc quality?
• Long lists of CD quality indicators do not really interest me. Which ones are really important? • Is it true that BLER is the best measure of CD quality? • Why do low BLER discs fail in some user drives? • Is it true that jitter is the most important measurement of CD quality? • What do the tests referenced in CD standards really mean? • CD jitter test equipment seems to be expensive. Correlation problems also seem to exist. Is jitter really important? Is there an inexpensive way to measure jitter? • Why do you insist that CD E22 and E32 errors must be zero? I cannot find this requirement in any of the standards. Only BLER and BURST are specified, and seem to be adequate quality indicators. • Standards only require CD-ROM and CD-R discs to have a BLER less than 220. Why bother with tighter limits or other tests such as E22 and E32? • My CD-ROM discs unpredictably fail in the field. Some show E22 and E32 errors that do not always reproduce when the disc is retested. What is wrong with
