Tone Control

アンプなどについている、Treble/Bassのことです。前から使っているTRIO TW-31の周波数特性がなにかおかしいので、プリアンプ段についているCR型トーンコントロール回路を見直したところ、回路が逆に実装されているようでしたので、 10k、50k、100kの可変抵抗を用いた回路を再実装しました。

減衰が大きいので、両側にバッファアンプが必要となります。ボリュームはAカーブで、中央で15％程度を基準として作ってあります。基本的には、C/Rの上下比がボリュームの抵抗比と同じになるようにすればよいはずですが、系列の中の数値を選ぶ必要があるので、少々難しいかもしれません。

LTSpiceのファイルもありますので、簡単にシミュレーションできます。

TRIO TW-31オリジナル回路

TRIO TW-31オリジナル回路を反転させたもの

10k使用

50k (1)

50k (2)

50k (3)

TRIO TW-31に再実装した回路です。一部回路面の変更が必要となりました。

100k

And the whole problem hinges on the little tiny decision of what IE8 should do
when it encounters a page that claims to support ��standards��, but has probably
only been tested against IE7.

What the hell is a standard?

Don��t they have standards in all kinds of engineering endeavors? (Yes.)

Don��t they usually work? (Mmmm��..)

Why are ��web standards�� so frigging messed up? (It��s not just Microsoft��s
fault. It��s your fault too. And Jon Postel��s (1943-1998). I��ll explain that
later.)

There is no solution. Each solution is terribly wrong. Eric Bangeman at ars
technica writes, ��The IE team has to walk a fine line between tight support
for W3C standards and making sure sites coded for earlier versions of IE still
display correctly.�� This is incorrect. It��s not a fine line. It��s a line of
negative width. There is no place to walk. They are damned if they do and
damned if they don��t.

    -- Joel Spolsky
    -- "Martian Headsets" ( http://www.joelonsoftware.com/items/2008/03/17.html )

               *  rindolf tries to think what can cause the KDE 4 SNAFU on
                  his user.
       <rindolf>  And hopefully to avoid bissecting the KDE 4 config tree.
           <Zuu>  snafu... that wounds like a delicious cake :D
           <Zuu>  *sounds
       <rindolf>  Zuu: Situation Normal - All F****ed up.
           <Zuu>  :/
               *  Zuu gives the snafu cake to Dmage :D
           <Zuu>  Dmage, just eat the cake already
         <Dmage>  Zuu, are you hate my english? ;)
           <Zuu>  i hate your non-english
 <Black_Phoenix>  I english your hate
         <Dmage>  xD
           <Zuu>  Dmage, but i dont hate you! :D
 <Black_Phoenix>  and now I can do that
         <Dmage>  Zuu, learn russian then! :)
           <Zuu>  Hehe
           <Zuu>  Dmage, i think you'd hate my russion far more than i
                  would ever hate your english
       <rindolf>  Spasiva.
         <Dmage>  xD
         <Dmage>  learn 'Eto huinya!'
               *  Zuu steals the snafu cake back from Dmage and gives it
                  to rindolf instead
         <Dmage>  and apply everywhere
               *  rindolf eats the SNAFU cake
           <Zuu>  :D
               *  rindolf eats Zuu's Danish too.
           <Zuu>  Noooh!
               *  rindolf loves Zuu's Danish.
       <rindolf>  Yum yum.
           <Zuu>  tis mine!
           <Zuu>  My daaaanish :'(
       <rindolf>  My precioussssssssss!
           <Zuu>  tis gone :<

    -- SNAFU Cake
    -- ##programming, Freenode

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