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本帖最后由 dongbei 于 2009-4-5 17:14 编辑
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* `( N: ~3 C O+ M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
7 I0 r6 P( B8 w* ~Sampling mode 16-bit, 44 kHz
7 ]$ z7 w0 V2 H0 i' zInterface MME
' J: {# r/ J& m/ sTesting chain External loopback (line-out - line-in)
1 p& @8 u' Z3 T) B3 q5 c8 WRMAA Version 6.2.1 & _% x, e4 Q6 i0 T7 n" ` k9 v
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20 Hz - 20 kHz filter ON
6 ]" R2 c1 D" h) I0 Y' UNormalize amplitude OFF - p3 H5 A8 E3 L3 R0 Z1 |! I
Level change -2.0 dB / -1.9 dB $ j7 v2 d$ A9 M; W
Mono mode OFF
4 [! x* u& N' ^/ x8 [5 HCalibration singal, Hz 1000
, V' g* g, u1 J& A% e* _Polarity inverted/inverted
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Summary1 M( G6 b4 {" s6 i
Frequency response (from 40 Hz to 15 kHz), dB +0.68, -1.45 Average
& o9 e' S; I l/ U- n0 uNoise level, dB (A) -106.0 Excellent
6 u0 @% t2 v- K0 g5 c: }/ S7 z6 wDynamic range, dB (A) 93.7 Very good # X* t' ^) Y, N; R* R* |
THD, % 0.0033 Very good - Z. W3 \. C; t* {; k
THD + Noise, dB (A) -84.6 Good 8 H% Y! G/ y; v2 g: P
IMD + Noise, % 0.0070 Excellent 太好了3 B' t3 i, R& w+ n B8 j' P" X
Stereo crosstalk, dB -72.6 Good . A! G3 z& M; g
IMD at 10 kHz, % 0.0089 Very good 非常好0 K, \( F1 }. p& Y, ?
General performance Very good 3 H5 m; [6 R8 @
- D1 x ?$ `! z: ~- f9 {: [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?
- g( S" z3 x; M2 C4 B3 w我不懂,我只是偶然发现了这个问题。[img][/img] |
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