Here's me ABXing two identical files, each contianing 5 seconds of silence, with a similar confidence. Ironically I managed to do it on the first try:
foo_abx 2.0.2 report
foobar2000 v1.4 beta 1
2017-12-25 20:51:44
File A: 1.flac
SHA1: 30214aa861aadf122e8039d4d1b3e47b066ccc2e
Gain adjustment: +0.00 dB
File B: 2.flac
SHA1: 04e10ad8a704524be2c781954fe67ad9e7313b95
Gain adjustment: +0.00 dB
Output:
WASAPI (push) : Out: default, 32-bit
Crossfading: NO
20:51:44 : Test started.
20:51:48 : 01/01
20:51:51 : 02/02
20:51:54 : 03/03
20:51:56 : 04/04
20:51:58 : 05/05
20:52:00 : 06/06
20:52:05 : 07/07
20:52:06 : 07/08
20:52:09 : 08/09
20:52:11 : 08/10
20:52:11 : Test finished.
----------
Total: 8/10
Probability that you were guessing: 5.5%
-- signature --
f50ec8a551431e8bc564f68796a08bc4eb279f6d
What are you trying to imply? I did run the ABX multiple times just to confirm that I wasn't guessing and what would I get from guessing huh? If I am increasing bitrate then in the end its gonna end up hogging up more in storage and I am gonna end up with less songs. Clearly its not transparent. Again, here are the results
foo_abx 2.0.4 report
foobar2000 v1.3.17
2017-12-26 00:03:40
File A: HMLAR.flac
SHA1: 0884731b14b5ece375768ccaa23b296ebfe39af5
File B: HMLAR.opus
SHA1: 33516ef3f1fe64efaf4d8766d2f60bf3654344be
Output:
DS : Primary Sound Driver
Crossfading: NO
00:03:40 : Test started.
00:04:12 : 01/01
00:04:25 : 02/02
00:04:38 : 03/03
00:04:52 : 04/04
00:05:03 : 05/05
00:05:17 : 06/06
00:05:40 : 06/07
00:05:57 : 07/08
00:06:16 : 08/09
00:06:37 : 08/10
00:06:37 : Test finished.
----------
Total: 8/10
Probability that you were guessing: 5.5%
-- signature --
bf396091de2c60442e9a3297b0c7ae796022d336
foo_abx 2.0.4 report
foobar2000 v1.3.17
2017-12-26 00:52:48
File A: HMLAR.flac
SHA1: 0884731b14b5ece375768ccaa23b296ebfe39af5
File B: HMLAR.opus
SHA1: 33516ef3f1fe64efaf4d8766d2f60bf3654344be
Output:
DS : Primary Sound Driver
Crossfading: NO
00:52:48 : Test started.
00:53:32 : 00/01
00:53:44 : 01/02
00:54:09 : 02/03
00:54:19 : 03/04
00:54:31 : 04/05
00:55:07 : 05/06
00:55:38 : 06/07
00:56:14 : 07/08
00:56:30 : 08/09
00:56:56 : 09/10
00:57:20 : 10/11
00:57:41 : 10/12
00:58:00 : 11/13
00:58:20 : 12/14
00:58:20 : Test finished.
----------
Total: 12/14
Probability that you were guessing: 0.6%
-- signature --
6d034126f8b8867de87fc5371517e7cc6e462939