es高音質化?2006年11月10日 01時06分

mp3その他音質向上化メモ

Microsoftからお試し版Platform Builderを落としてきて入れる。
1.ARMV4Iプラットフォームを作る。
 最小限のカーネルでも不完全ながらも可。
2.カタログのコアOS グラフィックスおよびマルチメディアテクノロジ
 オーディオ-オーディオ圧縮マネージャ-GSM6.10 Codecを右クリックで
 OSデザインに追 加。
3.システム生成
4.フォルダのどこかにgsm610.dllがあるので検索して探し、
 esのWindowsフォルダにコピー。

HKEY_LOCAL_MACHINE\Drivers\BuiltIn\CODEC_GSM610を

"Prefix"=ACM
"Dll"="gsm610.dll
"Index"=dword:1
"Order"=dword:0
"Flags"=dword:2

HKEY_LOCAL_MACHINE\Audio\SoftwareMixerを

"SampleRate"=dword:AC44
"Buffers"=dword:4
"BufferSize"=dword:1000
"Priority 256"=dword:96


 まぁ、早い話これは効かない。ってか、レジストリ値がハリボテの可能性が高い。実は別のレジストリがあるとかじゃあ無かろうか。ていうか何で22kHzなんて制限かけてるんだろ。電話機の仕様として強制しなきゃならない感じのがあるんじゃろうか。
 とりあえずXScale用にコンパイルしたつもりのdllをウプっておく。意味は、無いんだろうな・・・ たぶん。

http://www.asahi-net.or.jp/~qv4a-skym/blog/gsm610.zip

心なしか音が良くなったとか逝ってる人たちは取り敢えずコレを再生してみるべし。16kHzのサイン波。PCでは殆ど聞こえないが、Zero3ではサンプリングレートコンバータで無理矢理11kHzに落とし込まれるのでデカくて耳障りな音が出る。
http://www.asahi-net.or.jp/~qv4a-skym/blog/wave.mp3
ま、こうなるようでは、高音質とはほど遠いわけだ。でも低音がしっかり出てるんで、悪くは無いんだよね。AMラジオのノイズが減った感じ。

コメント

_ フィルターの意味が逆 ― 2008年06月03日 23時10分46秒

"EnableLowPassFilter"=1
を入れれば
>11kHzに落とし込まれるのでデカくて耳障りな音が出る。
無くなります。

_ ひまあり ― 2008年06月05日 08時04分59秒

コメントありがとうございます。

ここでローパスフィルタの出番なんかいな・・・?
それやると低域が狂うだろうし、音源によるから個人的にはあまり使いたくないかも。

_ フィルターの意味が逆 ― 2008年07月17日 20時47分42秒

ローパスフィルタ=高音カットです。
1~2.3.4.5・・・お好みで設定してみてください。

_ ひまあり ― 2008年07月28日 02時32分14秒

すっごい初歩的なトコなのに勘違いハズカスィ・・・
低域カットはハイパスだね。

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トラックバック

このエントリのトラックバックURL: http://hima-ari.asablo.jp/blog/2006/11/10/746462/tb

_ KUROHAKO-BLOG - 2007年02月10日 20時19分39秒

W-ZERO3 esこれで音楽を聴いてみると ”高音域がばっさり削られたようになる”らしい・・・ 色々とネットで調べていくとサンプリング周波数が22kHzで 有ることが問題らしい。  もっとも私の安物...

_ KUROHAKO-BLOG - 2007年02月10日 21時03分15秒

W-ZERO3 esこれで音楽を聴いてみると ”高音域がばっさり削られたようになる”らしい・・・ 色々とネットで調べていくとサンプリング周波数が22kHzで 有ることが問題らしい。  もっとも私の安物...

_ Toshiのとりあえずブログ - 2007年02月26日 20時02分07秒

W-ZERO3(esも含んで)は音が悪いと良く言われています。実際ヘッドホンで聞いてみると、かなり悪いです。
これはドライバの関係で22KHz相当の音だそうです。大体AMラジオの音位だと書かれています。

そんな、音の悪いW-ZE