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本帖最后由 dongbei 于 2009-4-5 17:14 编辑 ' M( t. R0 [( W8 U
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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
" j% R3 a& |# B! C& J" Q: K3 dSampling mode 16-bit, 44 kHz
" E6 v1 Z g* d) X! yInterface MME / u* f0 {+ u8 e5 R' d- {4 j Q
Testing chain External loopback (line-out - line-in)
# q! Q# \: A. i$ j0 Z0 D; s* H3 z: qRMAA Version 6.2.1 * K/ |" q& c6 `1 e) b
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20 Hz - 20 kHz filter ON
_: z, W7 w) c, B% O5 g c# i2 t! xNormalize amplitude OFF
. F! @; v: r4 @Level change -2.0 dB / -1.9 dB 3 G1 V' M" a5 E5 ?! q
Mono mode OFF
7 E: ?& y; W% Y; E& y( jCalibration singal, Hz 1000
% D( @" r/ N4 NPolarity inverted/inverted
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Summary
6 W& |* Z4 D$ O$ x7 {3 qFrequency response (from 40 Hz to 15 kHz), dB +0.68, -1.45 Average 9 s5 M, J, l5 C; i5 B9 e( C1 X& j
Noise level, dB (A) -106.0 Excellent / x$ @9 D% V |9 ^
Dynamic range, dB (A) 93.7 Very good 2 s1 H. y7 K: q! w( d; d
THD, % 0.0033 Very good
, L U2 N- H& e4 q U' DTHD + Noise, dB (A) -84.6 Good 1 B9 h* B, R7 `/ H( @2 w
IMD + Noise, % 0.0070 Excellent 太好了5 m" S" ?! h% x, t
Stereo crosstalk, dB -72.6 Good & _# ^; @) p) u) N8 z, D
IMD at 10 kHz, % 0.0089 Very good 非常好8 ^3 d* M2 s. {, }, C* e
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?
. W6 _" |' W) i4 g l2 V4 m8 i我不懂,我只是偶然发现了这个问题。[img][/img] |
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