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本帖最后由 dongbei 于 2009-4-5 17:14 编辑 0 J# m# v' G/ ~! j
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请看安装了老驱动后的RMAA测试情况; o$ s* m! }8 B0 D& B3 \9 [' p3 m
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Testing device Sound Blaster X-Fi Xtreme Audio + j# x& S) ]9 z9 J8 V" b! \* c4 R
Sampling mode 16-bit, 44 kHz + k- s1 a' W/ s7 {
Interface MME 5 C/ {8 R/ L, I: q' a+ r
Testing chain External loopback (line-out - line-in)
, W+ Y8 A6 U4 c8 ?0 \RMAA Version 6.2.1 0 g7 I3 t" ~* e4 n# \
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& U( ^$ w' L# H! @8 c1 Y, |* H1 s20 Hz - 20 kHz filter ON ( ~. i8 D' G, j) l# }7 Y
Normalize amplitude OFF
' ], d" I, Y9 _: L. q0 o9 q3 i& G; T4 cLevel change -2.0 dB / -1.9 dB
# E; u' X$ B3 w/ V1 GMono mode OFF ; f% s8 ^# Z2 @
Calibration singal, Hz 1000 , x# s3 D' j" N* K! i9 L0 U/ {, ]
Polarity inverted/inverted
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Summary+ D4 C+ k- y- s
Frequency response (from 40 Hz to 15 kHz), dB +0.68, -1.45 Average 6 M( I6 D8 d2 z. k% m
Noise level, dB (A) -106.0 Excellent
6 [: T5 E9 Y3 k7 hDynamic range, dB (A) 93.7 Very good
/ ^/ a# r0 q! f0 X. G6 G& K7 ?THD, % 0.0033 Very good
5 v; P% K, g$ x" t, X( J0 g C6 TTHD + Noise, dB (A) -84.6 Good 9 d4 Q2 s* b, z4 n: _4 Q
IMD + Noise, % 0.0070 Excellent 太好了
9 O" v* v+ m8 ?, r6 Q* k! hStereo crosstalk, dB -72.6 Good
! i6 A# j& C Y& ~% I% A GIMD at 10 kHz, % 0.0089 Very good 非常好% b' h' T7 X3 \7 q W" N
General performance Very good $ U: ~. ^% ]3 w2 z! [7 m6 u
2 @4 P A8 P- \$ r# W. c. `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?
3 h8 V! H V' q" T; L/ F& R我不懂,我只是偶然发现了这个问题。[img][/img] |
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