As for speed differences on seemingly pristine CDs that do not raise any C2 error flags: I think some drives turn down the speed if it senses that the disc isn't perfectly balanced.
Hans is a longstanding audio writer.I recognized that name and face, and not for the good. He advocates 192 kHz for end-user format out of his willful ignorance of audio. Someone at audiosciencereview posted this screenshot for public ridicule:
Do you have that dash in the name of your genres "Pop-Rock" or you just used it on the forum?
Do you put hard rock bands in "Pop-Rock" as well. Right?
Case, what do you think of these two software packages; Audio Optimizer and Fidelizer Pro? I do not own them but found them referred to in some other discussions. They are supposed to shut down extraneous processes in a Windows based music server to reduce jitter. Are they snake oil in your opinion?They might in theory work on some machine, but not the way the authors describe. There are known cases of harware monitoring tools and broken drivers causing DPC latency issues that make realtime audio playback glitchy. If these tools happened to close whatever process or driver was responsible for the issue then they would introduce an actual improvement in sound. But if one suffers from this problem the solution is not to buy these expensive tools but to uninstall the bad software / find the broken driver and update or disable it.