The guy doing the demo wasn by any chance trying to sell $50 disks, now was he?
And, no, I have not done a double blind test. But, I would not mind being proven wrong. Just that based on the physics and technology, unless the CD player had a high error rate to begin with due to an underdamped servo system – he could have jimmied it – then there simply is no basis for expecting such things to improve a digital datastream. If the error rate decreased due to his discs, then perhaps there would be some sonic improvement. But, it should not have been high to begin with. Error rate reduction is the only possible mechanism I can think of to explain any possible audible differences. However, virtually all errors due to disc imperfections and scratches are *fully* corrected and thus undetectable in the output by human or machine.
