I do not understand why it so audio blanks are major differences, then no matter how large problems and quality defects in CDR. In part it is of course the fact that cheaply abroad (India, Taiwan etc) is produced. On the other hand, agrees especially the Kallibrierung the blanks no longer front and rear. Examples: long I TDK Audio in the Phillips CD recorder used (for digitization of own vinyls) until the accumulated losses so that it is no longer worthwhile. The EMTEC, with whom I had previously had good experiences, suddenly eh no longer gabs. After researching on the internet I switched to Sony and has long been satisfied. But suddenly here Abruch recording after the first half (sudden update), advertisements as disc error, no disc, or the like. If the big companies is so regardless of how the quality of their audio blanks is because it supposedly no longer worth it to produce, then they should they stop taking the same throughout the market.