A Brief History of CD DBTs
On Dec 17, 6:49=A0am, "Arny Krueger" wrote:
"Scott" wrote in message
...
On Dec 14, 8:21 pm, Audio_Empire wrote:
The person who was questioning to value of level matching did not seem
to be limiting his opinion to CDPs and amps.
Seems like the backwards side of the argument. Doing comparisons of music
players, DACs and amps without proper level matching seems to be the prel=
ude
to a massive waste of time. If the levels are not matched well enough the=
n
there will be audible differences, but we have no way of knowing that the
causes are not our poor testing practices as opposed to any relevent
property of the equipment being tested.
Why on earth would you cut out all the relevant discussion and then
post the obvious which has already been covered? I already stated that
level matching is essential in any ABX DBT of the above components
since the goal of an ABX test is only to test for audible differences
and not preferences
..
You still have the same
problems in level matching that I stated above when dealing with
loudspeakers. In fact you have even more problems with radiation
pattern differences and room interfaces that make it even more
impossible to do a true level match.
The known technical differences among loudspeakers are immense and gross
compared to those among music players, DACs and amps. I know of nobody wh=
o
claims that speakers can be sonically indistinguishable except in limited=
,
trivial cases. I don't know how this fact relates to a thread about "A br=
ief
history of CD DBT" except as a distraction or red herring argument.
I suggest you follow the thread more closely if you think this is a
red herring argument rather than a relevant point in regards to issues
raised in this thread by another poster when it comes to use of DBTs
for determining preferences And the relative merits and difficulties
of level matching that one has to deal with in doing blind preference
comparison tests with things that really cant be truly level matched
due to differences in dynamic range and frequency response among other
things.
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