Lossy audio encoding aka let's pretend we have golden ears

Hello Sup Forums - I require you to perform a simple ABX test. Use whichever equipment you have: contrary to popular belief, a shitty equipment may be affected more by a shitty mp3 than real monitor headphones.

About ABX tests:
>en.wikipedia.org/wiki/ABX_test
>wiki.hydrogenaud.io/index.php?title=ABX

Cross-platform software:
>lacinato.com/cm/software/othersoft/abx
(Windows goys may use foobar2000.org/components/view/foo_abx )

I'm shipping three FLACs.
One of these is the source file.
One is derived from an MP3, obtained from the source. Relevant switches:
-m j -V 1 -q 0 --lowpass 22.1 -b 128 -Y -F
One is derived from an M4A, obtained from the same source. Relevant switches:
--afterburner 1 --bandwidth 18000 --profile 2 --bitrate 224k

To minimize cheating I've chopped off higher frequencies (AFTER encoding). Please don't cheat.
Post results.

my.mixtape.moe/bwoesf.zip

(tripcode will be used only once to post solution and then released)

Other urls found in this thread:

wiki.hydrogenaud.io/index.php?title=Opus#Music_encoding_quality
my.mixtape.moe/yytzit.zip
twitter.com/NSFWRedditGif

welp bumping just once with doggo
go, doggo

personally I believe I'm able to tell the difference between the original and the other two, even if I can't distinguish mp3 from m4a

forgot doggo

Kill yourself reddit.

But what is the question you want people to answer?

1) perform ABX test
2) post results
3) ???
as simple as that I guess

>nigger music
Yeah no thanks.

Why did you alter the files? What music is this? You probably can't tell if it was mastered incorrectly.

>MP3
Use OPUS

in case you don't know, it's easy to spot a lossy codec just by looking at a spectrogram. frequencies above 16~18MHz are anyway near to be irrelevant as far as the overall quality of the audio is concerned
the music is irrelevant