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因为懒得去折腾耳放和解码器所以又入了张老虎卡
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耳机是HD600，现在在和原来的MIA MIDI+国产HEF188对比听中，暂时感觉良好
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! n5 I) p+ ?* G$ Q但是现在没搞明白ASIO时的音量怎么调节？控制台的音量控制完全起不了作用。只能靠Foobar的音量条工作。驱动本身有没有其它方法控制那个耳放芯片呢？
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另外顺便关于耳放增益的问题，耳放选择关键是阻抗匹配，那么HD600（300ohm应该选+12db（64~300ohm）还是+18db（300-600ohm）比较好？* A1 k7 y' B3 [- ~3 W6 ?$ l R' Z- ?
尽管+18明显很有推力，但感觉好像有点过头有点吵的感觉。
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3 h) g/ B' a; T% {PS:在驱动说明里找到的答案
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Xonar Essence ST bit-perfect ASIO driver (beta) for Windows XP 32/64bit7 z C/ C* a6 y' }+ O
1. Sample rate supported: 44.1 / 48 / 88.2 / 96 / 176.4 / 192 kHz
& u# T2 R X% r( r Y* m8 W3 E K2. Supports one ASIO playback stream (maximum 8 channels) to analog output.
3 @ S$ E: r% p- J8 K. A3. Supports one ASIO recording stream (2 channels) from analog input. r' x8 t* L" }, e, f3 x
4. Recording source (microphone in or line in) is selected by system mixer.
: c4 t9 U2 S5 g5. To keep the ASIO stream bit-perfect, the following two rules apply:
! G6 i) ]5 s8 L(1) The ASIO stream has higher priority of using DMA buffer than other streams. That is, when the ASIO stream is played, other streams cannot be played.
5 F4 h2 A' S5 `4 M/ n5 f4 `$ k(2) No volume control is available for the ASIO stream.
& m) U2 d2 c1 W3 ^# k8 m6. When there are more than two ASIO applications running, only one application gets the right to use the hardware resource. This is based on “first come, first service” rule.$ h+ n7 L" o+ g8 l- j8 `4 W
7. Current buffer time is set at 10ms, will be adjustable in later version.) v& q U- @" L
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, q9 t) \" ?" P3 j8 A. R8 n这样做有意义嘛？我调用foobar的音量功能岂不更糟糕。; ^2 F( I% b* t! C2 S5 Z
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小白一个，不胜赐教 |
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发表于 2010-9-13 21:37
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