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本帖最后由 dongbei 于 2009-4-5 17:14 编辑 - D4 e) X' `7 U8 u
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请看安装了老驱动后的RMAA测试情况
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- O) A- ~# C& D/ V2 b9 UTesting device Sound Blaster X-Fi Xtreme Audio 4 S6 ^9 s. X2 Z' ~
Sampling mode 16-bit, 44 kHz + x% [3 b, O" L
Interface MME
1 u \ v8 D v5 MTesting chain External loopback (line-out - line-in) + [& O& D' s/ M" A; r( X0 |3 l
RMAA Version 6.2.1 e6 J L! j6 @" Z- D g; r" O+ V! c
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20 Hz - 20 kHz filter ON 1 Z W R! V5 S6 w* U9 V: H
Normalize amplitude OFF . ?( _2 a) e/ t7 e+ C6 Y& x
Level change -2.0 dB / -1.9 dB
/ Z6 o8 G4 b/ O5 b% y8 o( pMono mode OFF
8 z9 s3 R; g5 t6 I' DCalibration singal, Hz 1000 Q6 U0 u- w+ ?& Z! J6 ]0 M6 x
Polarity inverted/inverted ; I: g6 i ?0 R
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: K$ ^9 g" @: j( dSummary
7 X$ v, W# g' P( i3 A7 H/ a/ DFrequency response (from 40 Hz to 15 kHz), dB +0.68, -1.45 Average : H2 ^, N& x2 c* v
Noise level, dB (A) -106.0 Excellent / J" ^' x+ ]/ f$ o, \3 h
Dynamic range, dB (A) 93.7 Very good ( b f* o1 z0 K4 r* H. |
THD, % 0.0033 Very good - p- \. N, {1 d: O
THD + Noise, dB (A) -84.6 Good
2 F6 A/ [" U' xIMD + Noise, % 0.0070 Excellent 太好了( V! g% g! Y. }
Stereo crosstalk, dB -72.6 Good # ~7 \7 r, J& l! e' h% m0 \
IMD at 10 kHz, % 0.0089 Very good 非常好+ }$ A3 p3 d# G( V9 c
General performance Very good - ^. Z: v' o0 n* x* E$ X- a
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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?+ \1 Y5 g2 j1 F+ Q
我不懂,我只是偶然发现了这个问题。[img][/img] |
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