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abx test-flac vs. mp3 320 crb, mp3 320 (fake?) test
pixote
post Oct 28 2011, 15:14
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hi
i m new here on this forum
i ve heard a little about the abx blind test
i must say that i don t know much about such things
my music is in flac format and i convert that flac in foobar to mp3 320kbps cbr,
can someone explain me how and where i can make a test where i can see if there s a diference in sound between
flac and mp3 320 cbr (converted form the same flac)
and i want to ask you something else: i have a lot music in mp3 320 from the net, is it possible that i test that music somehow if it is fake mp3 320kbps (someone could convert it from 128 to 320 and upload that on the net as 320kbps)
?
thanks in advance for answering me
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Aquares
post Nov 7 2011, 14:15
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QUOTE (pixote @ Oct 28 2011, 16:14) *
(...)is it possible that i test that music somehow if it is fake mp3 320kbps (someone could convert it from 128 to 320 and upload that on the net as 320kbps)?
There are some indications you can look after, particularly a cut in high frequencies (above 15 or 18kHz).
Sometimes people record in 320kbps from internet radio stations that broadcast in 128kbps or lower and that apply some additional tools that deteriorate sound quality (compressors/limiters are heavily used by radio stations). You can additionally look after a low peak volume (lower than ca. -0.5dB, e.g. -5dB) to detect some of those recordings.

But if you really can't differentiate at all between flac and 45kbps Ogg with headphones, all of this shouldn't bother you too much. Just a hint on this: try some different tracks and positions, try to concentrate, e.g. on highs, on the stability of the room, on unnatural sounding instruments or on artifacts. Use acceptable headphones, listen in a quiet room. Repeat it later before you get tired.
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- pixote   abx test-flac vs. mp3 320 crb, mp3 320 (fake?) test   Oct 28 2011, 15:14
- - stranhoROX   You can use foobar2000 to perform ABX tests after ...   Oct 28 2011, 15:28
- - pixote   i ve downloaded the foobar abx comparator (foo_abx...   Oct 28 2011, 15:43
- - db1989   Select the two tracks (e.g. the uncompressed WAV a...   Oct 28 2011, 15:57
- - pixote   i ve added two songs in foobar , first is in wav....   Oct 28 2011, 16:14
- - tpijag   Do you have it installed? http://www.foobar2000.or...   Oct 28 2011, 16:37
- - pixote   i think i found it i selected those two songs in ...   Oct 28 2011, 17:00
- - tpijag   anything   Oct 28 2011, 17:04
- - db1989   Bear in mind, though, that comparing one lossy fil...   Oct 28 2011, 17:08
- - pixote   i think now i understand it i took two different s...   Oct 28 2011, 17:43
- - db1989   …That’s a rather unorthodox way of vis...   Oct 28 2011, 20:27
- - pixote   i must say that i dont heard the difference betwee...   Oct 29 2011, 10:54
|- - ojdo   QUOTE (pixote @ Oct 29 2011, 11:54) i mus...   Oct 29 2011, 11:42
- - pixote   can anyone help me with the spectral analisys of t...   Oct 29 2011, 17:21
- - tpijag   http://wiki.hydrogenaudio.org/index.php?title=LAME...   Oct 29 2011, 17:31
- - pixote   then i will cancel all this about the spectral ana...   Oct 29 2011, 17:49
|- - greynol   QUOTE (pixote @ Oct 29 2011, 09:49) then ...   Oct 29 2011, 18:33
- - pixote   i converted a flac file to ogg 45kbps (when i clic...   Oct 29 2011, 22:09
|- - greynol   QUOTE (pixote @ Oct 29 2011, 14:09) my he...   Oct 29 2011, 22:15
|- - Light-Fire   QUOTE (pixote @ Oct 29 2011, 17:09) ...i ...   Oct 30 2011, 04:17
|- - Gecko   I am confident that your 320kbps mp3s will sound g...   Oct 30 2011, 09:36
- - probedb   I'd also do a frequency hearing test. I though...   Oct 30 2011, 08:58
- - pixote   does this mean now as i cant on abx test on my lap...   Oct 30 2011, 09:18
- - Aquares   QUOTE (pixote @ Oct 28 2011, 16:14) (...)...   Nov 7 2011, 14:15
- - soulsearchingsun   QUOTE (Aquares @ Nov 7 2011, 15:15) Just ...   Nov 7 2011, 15:16


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