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本帖最后由 dongbei 于 2009-4-5 17:14 编辑
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/ G5 h: ?: T' m% X% a- C请看安装了老驱动后的RMAA测试情况) t! i$ h6 k. e
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Testing device Sound Blaster X-Fi Xtreme Audio
N. ^+ z3 |6 X3 Y' ySampling mode 16-bit, 44 kHz 6 u" A& K! v' y5 U/ j
Interface MME * v/ f) B# [" S* K g5 a* ?, f7 W
Testing chain External loopback (line-out - line-in)
& ]: q1 S2 k7 d s& d' m9 ~RMAA Version 6.2.1
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" W* P0 x4 Z- }, P5 w1 I+ }: a$ Y% c4 r20 Hz - 20 kHz filter ON
$ ]9 | d2 d: C9 m) uNormalize amplitude OFF
6 u& |' W3 a# M7 F- M3 @4 fLevel change -2.0 dB / -1.9 dB 6 M# ~ Y; S3 g. q' d V: q5 `
Mono mode OFF # B+ \; l+ ]7 |: V
Calibration singal, Hz 1000
" j: f. |8 ^' IPolarity inverted/inverted
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- W8 A& F1 ]. b. i# k+ ESummary
( V1 p1 O: i; D2 |8 [8 oFrequency response (from 40 Hz to 15 kHz), dB +0.68, -1.45 Average , p( {+ X! m% p7 ?/ c
Noise level, dB (A) -106.0 Excellent
9 I! W0 n3 C& V2 rDynamic range, dB (A) 93.7 Very good ! J; |$ s8 C i8 s& Z, @
THD, % 0.0033 Very good : x6 z) P' U0 j/ c( F7 H% a& q. K! I
THD + Noise, dB (A) -84.6 Good 8 o3 t: ?3 X9 y2 E- s$ U7 P7 b) g
IMD + Noise, % 0.0070 Excellent 太好了) \+ Z) c4 Z+ L `
Stereo crosstalk, dB -72.6 Good - L: [' V4 D3 {0 J9 g; \
IMD at 10 kHz, % 0.0089 Very good 非常好5 A+ G$ J/ r, G7 E! h1 c
General performance Very good
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( O5 H' l7 ^4 {% V" YIMD 在10KHZ的位置 一个在天,一个在地,差别如此悬殊,问题在哪里?# \* M3 z4 ^. w0 S# p4 z
我不懂,我只是偶然发现了这个问题。[img][/img] |
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