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本帖最后由 dongbei 于 2009-4-5 17:14 编辑 ! Z+ p$ ~( |5 Z2 ~% ?3 B6 L: n
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请看安装了老驱动后的RMAA测试情况# x7 a. F4 b0 g) g
+ p% c; }# G$ u( T# D$ ^! B* [Testing device Sound Blaster X-Fi Xtreme Audio 9 ]7 s+ Q1 t. k6 e# K
Sampling mode 16-bit, 44 kHz 0 S! G7 r4 r/ B/ Y) _+ t/ t! I
Interface MME
! ~: |9 K. t% `. `: D. A JTesting chain External loopback (line-out - line-in)
( R% m# u6 p5 v7 a! D- r# `RMAA Version 6.2.1 $ I( D) b! C; Z' s" L B
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" T' p# b3 J3 O9 {20 Hz - 20 kHz filter ON 3 \' @, A7 R! S# c$ S
Normalize amplitude OFF
$ u; P! Y( U& g1 nLevel change -2.0 dB / -1.9 dB L' J" c- y3 Y* Q
Mono mode OFF
. O- F5 T# ]2 `9 _4 pCalibration singal, Hz 1000 , A) h; d8 d9 J. H" b8 r. [6 k
Polarity inverted/inverted
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Summary9 A. N; s8 g6 Q' G5 b- I$ ]
Frequency response (from 40 Hz to 15 kHz), dB +0.68, -1.45 Average + b x* j: t- ^' Y
Noise level, dB (A) -106.0 Excellent
' E( s1 J8 _* f, I, B1 r4 E- W3 bDynamic range, dB (A) 93.7 Very good
# i8 d1 j) H0 G; ~THD, % 0.0033 Very good . W( [$ X" z4 d" }9 F J, V
THD + Noise, dB (A) -84.6 Good $ o5 x! x1 H$ V) `8 C7 v7 o$ h
IMD + Noise, % 0.0070 Excellent 太好了
* ^# f/ m/ r: x' ~- l0 A: cStereo crosstalk, dB -72.6 Good 8 d& N: j, r' ^
IMD at 10 kHz, % 0.0089 Very good 非常好9 ^+ k7 l5 Z C9 F* o
General performance Very good / D. E" [7 L- q I: {3 ~
" b. D9 m4 U1 j- X4 w2 p# n9 LIMD 在10KHZ的位置 一个在天,一个在地,差别如此悬殊,问题在哪里?
5 Y0 Y8 v p+ N6 y4 D我不懂,我只是偶然发现了这个问题。[img][/img] |
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