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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2 h9 `3 c6 M1 P# L
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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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! x3 l, E9 d  Y3 J7 `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" f' a( w3 ^5 c5 ]$ I& ^+ \
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P-70 and D-70 combination ($7500 and $6500 respectively),米物。) U5 N; [# _5 |4 C& k0 q9 m' V7 w

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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.4 V5 @- V( A4 K1 O0 k
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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.
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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# h; g# Z  {5 i+ I" G* Y+ T  C
找到了,TEAC Esoteric P-70 CD Transport and D-70 D/A Converter
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P-70 and D-70 combination ($7500 and $6500 respectively),米物。+ b1 w2 ]: S; M5 p0 K* j# n
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* `9 O- }0 s- K/ k* |8 B( sThe P-70 can achieve word synchronization by accepting  ...

: g, u+ F/ l+ e! M$ n; T' g/ c) Z不想上CD啊。就在PC上玩玩。
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