MP3ファイルで最適なビットレートを見つける その3

"http://www.kwmr.co.uk/blog/archives/2005/11/mp3_2.html">MP3ファイルで最適なビットレートを見つけるその2の続きです。

VBR(可変ビットレート)の場合
CBRと比べて音の輪郭がしっかりしている。クオリティ2ぐらいまでは違和感なく聞けるが、
それより下げると高域の情報量はもとより中域がかなり詰まる感じになる。女性ボーカルではつらそうな感じ。

VBR Q=0 – 44.1KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175335216.jpg"
target="_blank"> height="174"
alt="vbr_q0"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175304522.jpg"
width="350" />

VBR Q=1 – 44.1KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175336939.jpg"
target="_blank"> height="174"
alt="vbr_q1"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175306084.jpg"
width="350" />

VBR Q=2 – 44.1KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175338581.jpg"
target="_blank"> height="174"
alt="vbr_q2"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175307607.jpg"
width="350" />

VBR Q=3 – 44.1KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175340324.jpg"
target="_blank"> height="174"
alt="vbr_q3"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175309079.jpg"
width="350" />

VBR Q=4 – 44.1KHz
  "http://www.kwmr.co.uk/blog/archives/images/file_20051127T175342066.jpg"
target="_blank"> height="174"
alt="vbr_q4"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175310721.jpg"
width="350" />

VBR Q=5 – 44.1KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175343739.jpg"
target="_blank"> height="174"
alt="vbr_q5"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175312223.jpg"
width="350" /> 

VBR Q=6 – 44.1KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175345441.jpg"
target="_blank"> height="174"
alt="vbr_q6"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175313695.jpg"
width="350" />

VBR Q=7 – 32KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175347194.jpg"
target="_blank"> height="174"
alt="vbr_q7"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175315238.jpg"
width="350" />

VBR Q=8 – 32KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175348926.jpg"
target="_blank"> height="174"
alt="vbr_q8"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175316780.jpg"
width="350" />

VBR Q=9 – 24KHz
  "http://www.kwmr.co.uk/blog/archives/images/file_20051127T175350669.jpg"
target="_blank"> height="174"
alt="vbr_q9"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175318262.jpg"
width="350" />

MTRHオプションを使用した場合
ほとんどかわりはありませんが、ドラムの余韻が雑になる感じがします。しかし、それ以上にエンコーダ時間が減少するので、
一般的な使用においては問題ないでしょう。(本当にあっという間）

VBR Q=0 – 44.1KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175352301.jpg"
target="_blank"> height="174"
alt="vbr_q0_mtrh"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175319854.jpg"
width="350" />

VBR Q=1 – 44.1KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175354053.jpg"
target="_blank"> height="174"
alt="vbr_q1_mtrh"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175321386.jpg"
width="350" />

VBR Q=2 – 44.1KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175355686.jpg"
target="_blank"> height="174"
alt="vbr_q2_mtrh"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175322929.jpg"
width="350" />

VBR Q=3 – 44.1KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175357268.jpg"
target="_blank"> height="174"
alt="vbr_q3_mtrh"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175324451.jpg"
width="350" />

VBR Q=4 – 44.1KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175358900.jpg"
target="_blank"> height="174"
alt="vbr_q4_mtrh"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175325993.jpg"
width="350" /> 

VBR Q=5 – 44.1KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175400453.jpg"
target="_blank"> height="174"
alt="vbr_q5_mtrh"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175327495.jpg"
width="350" />

VBR Q=6 – 44.1KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175402025.jpg"
target="_blank"> height="174"
alt="vbr_q6_mtrh"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175329068.jpg"
width="350" />

VBR Q=7 – 32KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175403617.jpg"
target="_blank"> height="174"
alt="vbr_q7_mtrh"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175330590.jpg"
width="350" /> 

VBR Q=8 – 32KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175405260.jpg"
target="_blank"> height="174"
alt="vbr_q8_mtrh"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175332132.jpg"
width="350" />

VBR Q=9 – 24KHz
"http://www.kwmr.co.uk/blog/archives/images/file_20051127T175406932.jpg"
target="_blank"> height="174"
alt="vbr_q9_mtrh"
src=
"http://www.kwmr.co.uk/blog/archives/images/img_20051127T175333664.jpg"
width="350" />

総括
とりあえず、手っ取り早くそこそこ音が良くてHDD容量にも優しいのは、
プリセットのstandardを使えばいいでしょう。音にこだわるのであれば、extremeという感じで十分です。

ほかにもWMAやAAC、ATRACでも作成していますので、要望があればアップします(^^;

Related posts:

1. MP3ファイルで最適なビットレートを見つける その2
2. MP3ファイルで最適なビットレートを見つける その1