27 samples shift is so easy I just run the Xs. My perception is of a lateral shift across the horizon of the soundstage, of the target sound:
2015-04-25 00:26:33
File A: reference impulses 4 2klp 4416 norm.flac
SHA1: fb1ca13adfb07144138724d31d58dcec72a40a47
File B: impulses 4 2klp 4416 norm shift 27 samples .flac
SHA1: 80197bcba7ed96997778e7752deb1cf16babffa4
Output:
DS : Primary Sound Driver
Crossfading: NO
00:26:33 : Test started.
00:26:39 : 01/01
00:26:44 : 02/02
00:26:48 : 03/03
00:26:53 : 04/04
00:26:58 : 05/05
00:27:02 : 06/06
00:27:05 : 07/07
00:27:09 : 08/08
00:27:09 : Test finished.
----------
Total: 8/8
Probability that you were guessing: 0.4%
-- signature --
a1da43ab4c78a4ecb41725eacf714077512bdee8
9 samples shift is very difficult. I no longer hear a difference in the target sound however from my perception there is an extremely subtle difference in the background hiss. It is so subtle it is one of those things where one can't tell if it is simply a minute level change, like say .2 dB, or if there is actually a change in the spectral balance of the hiss. All I know is there is a tiny difference.
In any event, since these 9 sample shift results aren't in the spirit of what we are truly testing for, I post them simply to expose how we might see some people [like the organic twins] claim to be able to "hear" a difference at your 9 sample shift level even though it might just be some artifact with your conversion process, I'm not sure:
foo_abx 2.0 report
foobar2000 v1.3.3
2015-04-24 23:56:52
File A: impulses 4 2klp 4416 norm shift 9 samples .flac
SHA1: 257245f5370395be10108dd0dc99ca4f2bcc3a84
File B: reference impulses 4 2klp 4416 norm.flac
SHA1: fb1ca13adfb07144138724d31d58dcec72a40a47
Output:
DS : Primary Sound Driver
Crossfading: NO
23:56:52 : Test started.
23:57:42 : 01/01
23:57:49 : 02/02
23:57:56 : 03/03
23:58:01 : 04/04
23:58:13 : 05/05
23:58:17 : 06/06
23:58:22 : 07/07
23:58:26 : 08/08
23:58:30 : 09/09
23:58:36 : 10/10
23:58:36 : Test finished.
----------
Total: 10/10
Probability that you were guessing: 0.1%
-- signature --
bbdaa32033488f9bd2442eed5bc22c34151f22cf
I can't hear any difference, of any kind, on the 1 sample shift level.
P.S. What is that oddball file of the five in your folder, recorded at a lower level, also with "9 samples" as part of its name? ... Oh wait. It doesn't say "norm", so that means it hasn't been normalized I guess?... Hmm, maybe your normalizing procedure is what I'm keying on for that change to the hiss at the 9 sample shift level?