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本帖最后由 dongbei 于 2009-4-5 17:14 编辑
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请看安装了老驱动后的RMAA测试情况
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Testing device Sound Blaster X-Fi Xtreme Audio
+ B4 R! Q- d% Y& ESampling mode 16-bit, 44 kHz 6 U# j2 J/ L" v7 R$ E* n, ^
Interface MME
( z6 P# n; i! x1 e, NTesting chain External loopback (line-out - line-in) * q: C' @' O4 ~* X, Y" ^
RMAA Version 6.2.1
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' |% v; Q& P9 K e# i20 Hz - 20 kHz filter ON . ^( e8 p4 w5 ]/ S# p, t4 }. U
Normalize amplitude OFF
5 |) _8 \. Z- j! B& Z6 M" S% HLevel change -2.0 dB / -1.9 dB
0 T6 u6 k9 w; ?Mono mode OFF 1 ?3 L1 J$ E. ]- X
Calibration singal, Hz 1000 5 i8 |4 |' O0 s u: h7 `
Polarity inverted/inverted
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Summary I% {8 H- h; b- N+ q, A
Frequency response (from 40 Hz to 15 kHz), dB +0.68, -1.45 Average ; m( n8 }( r! b. C2 D& @. E
Noise level, dB (A) -106.0 Excellent
$ b- r) C) U. E' xDynamic range, dB (A) 93.7 Very good
1 M1 I$ \. J3 V- _ y2 nTHD, % 0.0033 Very good " z9 z- @1 R0 w6 K; [
THD + Noise, dB (A) -84.6 Good 3 f4 N0 o, M7 K! e) j
IMD + Noise, % 0.0070 Excellent 太好了/ y& n- U. d h ?0 t8 d
Stereo crosstalk, dB -72.6 Good : E" ^/ K- Z1 A. R
IMD at 10 kHz, % 0.0089 Very good 非常好9 _* u, ]+ ~( h6 Z, W: s! e: S
General performance Very good
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IMD 在10KHZ的位置 一个在天,一个在地,差别如此悬殊,问题在哪里?# R# I+ \0 T( u" N# ^8 k
我不懂,我只是偶然发现了这个问题。[img][/img] |
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