vizouk
Portugal@Home Member
Ok tinha escrito algo, mas como o post ja era e fiquei sem tempo deixo isto aqui.
O resultado de um codec lossy e muito dependente do estilo musical / musica escolhidos.
O post encontra-se num forum privado que não da para linkar.
Eu pessoalmente num teste
http://www.hydrogenaudio.org/forums/index.php?showtopic=16295
Nao consigo notar diferenças entre um v2 ou v0 e flac.
O resultado de um codec lossy e muito dependente do estilo musical / musica escolhidos.
O post encontra-se num forum privado que não da para linkar.
Here's some more detailed ones. The song is Awake by Mutiny Within, loud metal with lots of high frequency action.
You have to keep in mind that one of the main principles of lossy encoding is the masking effect, where things that are removed were inaudible when simultaneously sounded against other, louder sounds that were close by in the frequency domain. They become perfectly audible when subtracted from the original soundwave in the invert + mix process.
I will include the subtracted audio files too once they finish uploading Done.
What was removed from Vorbis q8
What you can hear in this file is mainly remnants from drums, basically sounds like static though. You can hear a little bit of the vocals, mainly the airy part of the voice.
http://www.mediafire.com/?7v0im2rt1fwa492
What was removed from MP3 V0
More vocals are audible in the remnants, still behind lots of drum "static." The static is definitely more focused in the higher frequencies compared to Vorbis. There seems to be random noises every once and a while.
http://www.mediafire.com/?zz9c8v2zsejmllf
What was removed from AAC q 0.66
This version has the original music most audible. Whether or not that means something is debatable. I can even make out a few snare hits, as well as the "click" of the bass drum, instead of them being masked in the drum static.
http://www.mediafire.com/?64zjazaoa72wrly
If anyone wants a low bitrate comparison, let me know.
Eu pessoalmente num teste
http://www.hydrogenaudio.org/forums/index.php?showtopic=16295
Nao consigo notar diferenças entre um v2 ou v0 e flac.
Última edição: