Hi Pavel, nice to see you come back with some tests!
Ok here is my first attempt. I had to guess during the test that A stays A, and B stays B throughout, only X and Y changes, which did not help. I will try to install wasapi or ASIO next.
foo_abx 2.0.6d report
foobar2000 v1.6.2
2020-12-09 21:55:09
File A: Quintet1.flac
SHA1: 78941da5875a6dc51169e29bbbb909399b75c377
File B: Quintet2.flac
SHA1: 2cea48c9ec2b493807e65e1d2b49deb19b543939
Output:
Default : Primary Sound Driver
Crossfading: NO
21:55:09 : Test started.
22:01:50 : 01/01
22:02:41 : 02/02
22:08:40 : 03/03
22:09:06 : 04/04
22:11:10 : 04/05
22:12:12 : 05/06
22:13:07 : 06/07
22:13:44 : 06/08
22:14:10 : 06/09
22:14:33 : 07/10
22:14:33 : Test finished.
----------
Total: 7/10
p-value: 0.1719 (17.19%)
-- signature --
6a05d8090e3d3a2108473701283f1b6b9b189839
Music feels quite "distorted" or inharmonic in itself, which makes it a rather tricky and fatiguing test.
It is very strange that the difference is quite immediate at first, but ABX seems to make it abnormally difficult maybe due to repetition, listening fatigue, or other psychologic reasons. Like eating the same meal over and over, you lose the taste.
Can we talk about what we think is the distorted sample, and perceived subjective differences, or not yet?