Originally Posted by kwkarth
1. It is valid to seek for methods to objectively measure and quantify those audible differences heard.
2. Repeatability of subjective listening tests will be used as an indicator of potential validity.
1. No, it is not valid. Differences in cables are orders of magnitude below the hearing threshold. The tiny differences measured have no correlation to the sound signatures perceived and described by some audiophiles. However, there does seem (to me) to be a correlation between the differences described by some audiophiles and the differences documented in marketing literature and reviewers opinions.
2. DBTs have been carried out many times, repeatability has been demonstrated to occur only when some audiophiles believe the same cable is being used, regardless of the reality of which cable is actually being used.
Unfortunately, science at the present time has no way to objectively measure human perception of aural illusions or placebo effects. The problem being that perception is not a constant, it varies from person to person and even within the same person, depending on their belief of what they are listening to. There is no way to measure this, so unfortunately your experiment will have to wait until science has a better understanding of the processes which allow perception to vary so much relative to reality.