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楼主: zifzhu
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DAC与Jitter

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21#
发表于 2007-2-6 18:36 | 只看该作者
原帖由 zifzhu 于 2007-2-6 17:06 发表! a, i# s1 t$ i: l" y0 {# d

1 @' I9 R! W& l/ Z7 Y: w" q. E- K独立时钟不同于spdif信号的时钟。jitter就产生了。就是这种jitter最难对付。

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% H$ k* H- V) ~解决方法你自己在楼上已经说了,商品化的DAC也有,记得TEAC就有一款。
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22#
发表于 2007-2-6 18:47 | 只看该作者
找到了,TEAC Esoteric P-70 CD Transport and D-70 D/A Converter
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% b* \& Q! p& C6 f$ \P-70 and D-70 combination ($7500 and $6500 respectively),米物。9 ~2 W) g0 \2 P& y
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  2. The P-70 can achieve word synchronization by accepting a master clock from any suitably-equipped D/A converter. With the converter acting as the master clock, any jitter resulting from data transfer between the player and the converter is essentially eliminated.+ J; U$ z; j, [. y
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  2. TEAC also includes 128Mbits of RAM Link buffer (Refined Asynchronous Memory Link) to eliminate jitter, allow high bit-rate and high frequency sampling and make it unnecessary to continuously adjust the clock frequency. “The DAC is locked to a direct crystal-controlled fixed-frequency clock.” On the left and right channels there are three kinds of analog filters that are chosen automatically depending on the sampling frequency. Finally, the D-70 uses four multi-bit DAC Burr Brown PCM1704 units./ T/ n- [4 a# z7 n! a
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23#
 楼主| 发表于 2007-2-6 19:12 | 只看该作者
原帖由 gzXW 于 2007-2-6 18:47 发表
4 Q/ n* @! y1 c; E3 t找到了,TEAC Esoteric P-70 CD Transport and D-70 D/A Converter
- A* _# O7 g( u1 s2 r
0 k! V  Z- _/ p4 A+ r2 ?1 kP-70 and D-70 combination ($7500 and $6500 respectively),米物。- ]: K! y! Y8 p; ]# R) B

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) l3 {4 [' b+ Z7 I+ \8 J* v7 eThe P-70 can achieve word synchronization by accepting  ...

! R" k9 \. x9 C9 f$ i" h) q' h不想上CD啊。就在PC上玩玩。
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