I know bias-controlled testing is brought up when discussing amps, CDPs and cables, but the testing methodology itself is almost never explained in detail to the laymen - ie a step by step tutorial. I think it would great if people could do this kind of testing at home for themselves. My question is, is it possible for anyone to do or does it require extensive know-how to get right? Let's assume you wanted to test two amplifiers or two DACs - to the amateur, what is he in for? How complicated is the process? This thread is really just to outline what is required so that others can do the testing at home.
That makes complete sense! But if you are comparing two amps with different volume knobs and you can't adjust the volume in 0.2 dB or 0.1 increments then all bets are off?
Blind tests for different equipment are a bit more complicated, but blind tests for different software setup are trivial. Yet I have never seen any ABX reports from those claiming loudly that minimum latency/ram timing/keeping everything in CPU cache/playback processes must have max realtime priority/ etc. matters.
Quote from: Yahzi on 20 February, 2013, 12:57:12 PMThat makes complete sense! But if you are comparing two amps with different volume knobs and you can't adjust the volume in 0.2 dB or 0.1 increments then all bets are off?You can of course feed one of them a 0.2 dB louder signal, but you can also bet your backside that someone will complain that the reason they don't hear any difference between their outrageously expensive component and an off-the-shelf product, is that you have allegedly run the precious signal through a meatgrinder which renders everything equal
If one does not have an ABX comparator then the test results won't be properly controlled but ... semi-controlled? You can level match, but if you can't switch quickly... or quick enough then I assume the results, while not completely useless, are not reliable to a significant enough degree. Have I got that right?
I'm always trying to be introspective about what we hear and why we hear it, but looking at the other position - of audible differences - it doesn't always look like their case is incredible. Some of the DBTs on the site showed positive results, some of the negative results were then debunked.
Some of the links are broken. Why aren't there enough convincing DBTs on these things? Like CDPs ... and DACs... and amplifiers?
Give us real ammo to work with.
I assume this site doesn't contain all DBT's published online, surely?
I'm skeptical of any position sans supporting evidence
I'm steered into thinking that controlled tests should result in a null result, given perceptual research and the testing methodologies involved, the actual DBT research doesn't seem very comprehensive ... online.
That's how Science works - nothing about it is totally consistent. ;-)
The operative word appears to be give, which ordinarily implies altruism on the part of the provider and an exploitative situation with the person making the demands.
And the opposite view has exactly what?