Re: [LAU] ABX test invite

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To: <linux-audio-user@...>
Date: Friday, April 5, 2013 - 10:50 pm

On Fri, Apr 05, 2013 at 11:42:31PM +0200, Ralf Mardorf wrote:

> I made many tests not to get knowledge about my abilities, but when we

One of the more interesting jobs I've ever done was to define a procedure
to select 4 matching microphone capsules for Ambisonic mics. That's a lot
more difficult than finding good stereo pairs, and you can forget about
doing it by listening. The only thing you could probably achieve that way
is to identify a capsule as completely out of spec and unusable.
Nor can you do it by *simple* tests, which is maybe the only alternative
to listening you can imagine. It requires, amongst a lot of other things,
comparing directivity factors and phase response over the entire frequency
range, using criteria that are matched to the question to be answered :
can these four mics be used together for an AMB mic or not. It excludes
factors that would easily lead you astray when listening but which are
in the end irrelevant.

> The idea that there is something most near to perfect objectivity is

And that statement is completely irrelevant. Nobody (in this context)
claims 'perfect objectivity'. What remains is that a test that at least
tries to exclude subjective factors will be more *reliable* than one
that doesn't. The only purpose of an ABX test is to find out if you can
tell if X = A or X = B. And the only conclusion taken from that test
(and that conclusion follows logically from it) is that if you can't
do that, it must be very unlikely that you can hear any difference
between A and B. It says nothing about the quality of your ears, your
compentence as a sound engineer, the quality of the recordings, etc.

> Passing a test only will tell us, how good or worse we are in passing

Not 'a test' but *that particular test*, which may be highly relevant
even if you prefer not to believe it.

> Meaningful is the quality of our work and the quality depends to

That may be meaningful, but in an entirely different context.

Ciao,

--
FA

A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)

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Messages in current thread:
[LAU] ABX test invite, Peder Hedlund, (Wed Apr 3, 11:01 am)
Re: [LAU] ABX test invite, James Stone, (Fri Apr 5, 7:27 pm)
Re: [LAU] ABX test invite, Peder Hedlund, (Fri Apr 5, 11:24 pm)
Re: [LAU] ABX test invite, Ralf Mardorf, (Fri Apr 5, 9:48 pm)
Re: [LAU] ABX test invite, Ralf Mardorf, (Fri Apr 5, 9:43 pm)
Re: [LAU] ABX test invite, Fons Adriaensen, (Fri Apr 5, 10:50 pm)
Re: [LAU] ABX test invite, Ralf Mardorf, (Sat Apr 6, 12:44 am)
Re: [LAU] ABX test invite, Peder Hedlund, (Sat Apr 6, 1:03 am)
[LAU] Definition of "sound quality", Ralf Mardorf, (Sat Apr 6, 2:32 am)
Re: [LAU] Definition of "sound quality", Charles Z Henry, (Sat Apr 6, 2:14 pm)
Re: [LAU] Definition of "sound quality", Ralf Mardorf, (Sat Apr 6, 1:19 pm)
Re: [LAU] ABX test invite, Ralf Mardorf, (Sat Apr 6, 1:22 am)
Re: [LAU] ABX test invite, Peder Hedlund, (Wed Apr 3, 7:07 pm)
Re: [LAU] ABX test invite, Thomas Vecchione, (Fri Apr 5, 5:26 am)
Re: [LAU] ABX test invite, Raffaele Morelli, (Fri Apr 5, 6:26 am)
Re: [LAU] ABX test invite, Peder Hedlund, (Fri Apr 5, 9:02 am)
Re: [LAU] ABX test invite, Thomas Vecchione, (Fri Apr 5, 11:44 am)
Re: [LAU] ABX test invite, Ralf Mardorf, (Fri Apr 5, 1:50 pm)
Re: [LAU] ABX test invite, Peder Hedlund, (Fri Apr 5, 2:57 pm)
Re: [LAU] ABX test invite, Ralf Mardorf, (Fri Apr 5, 6:11 pm)
Re: [LAU] ABX test invite, Felix Homann, (Sat Apr 6, 7:24 am)
Re: [LAU] ABX test invite, Ralf Mardorf, (Sat Apr 6, 8:53 am)
Re: [LAU] ABX test invite, Peder Hedlund, (Sat Apr 6, 12:01 pm)
Re: [LAU] ABX test invite, Ralf Mardorf, (Sat Apr 6, 1:06 pm)
Re: [LAU] ABX test invite, Peder Hedlund, (Sat Apr 6, 1:56 pm)
Re: [LAU] ABX test invite, Peder Hedlund, (Fri Apr 5, 11:51 pm)
Re: [LAU] ABX test invite, Ralf Mardorf, (Sat Apr 6, 1:43 am)
Re: [LAU] ABX test invite, Ralf Mardorf, (Sat Apr 6, 1:42 am)
Re: [LAU] ABX test invite, Chris Bannister, (Sat Apr 6, 12:05 pm)
Re: [LAU] ABX test invite, Florian Paul Schmidt, (Fri Apr 5, 2:03 pm)
Re: [LAU] ABX test invite, Thomas Vecchione, (Fri Apr 5, 5:06 pm)
[LAU] Fair use laws - Was: ABX test invite, Ralf Mardorf, (Fri Apr 5, 2:11 pm)
Re: [LAU] ABX test invite, Peder Hedlund, (Fri Apr 5, 12:43 pm)
Re: [LAU] ABX test invite, Thomas Vecchione, (Fri Apr 5, 5:05 pm)
Re: [LAU] ABX test invite, Ralf Mardorf, (Fri Apr 5, 5:46 pm)
Re: [LAU] ABX test invite, Paul Davis, (Fri Apr 5, 12:20 pm)
Re: [LAU] ABX test invite, Thomas Vecchione, (Fri Apr 5, 5:04 pm)
Re: [LAU] ABX test invite, Raffaele Morelli, (Wed Apr 3, 11:55 am)
Re: [LAU] ABX test invite, Ralf Mardorf, (Wed Apr 3, 12:42 pm)
Re: [LAU] ABX test invite, James Stone, (Wed Apr 3, 3:14 pm)
Re: [LAU] ABX test invite, Ralf Mardorf, (Wed Apr 3, 4:11 pm)
Re: [LAU] ABX test invite, Peder Hedlund, (Wed Apr 3, 1:28 pm)
Re: [LAU] ABX test invite, Peder Hedlund, (Wed Apr 3, 1:35 pm)
Re: [LAU] ABX test invite, Ralf Mardorf, (Wed Apr 3, 3:25 pm)
Re: [LAU] ABX test invite, Peder Hedlund, (Wed Apr 3, 12:29 pm)
Re: [LAU] ABX test invite, Raffaele Morelli, (Wed Apr 3, 12:40 pm)