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在小明那边晃了几天，将8并用小明的设备测试了下，专业数字声卡RME96/8，ADC用百灵达SRC2496
平衡输出测试数据如下:
RightMark Audio Analyzer test report | Testing device | C-DREAM WM8740X8 | | Sampling mode | 16-bit, 44 kHz | | Interface | | | Testing chain | External loopback (line-out - line-in) | | RMAA Version | 6.0.6 | | | | | | 20 Hz - 20 kHz filter | ON | | Normalize amplitude | ON | | Level change | -0.2 dB / 0.1 dB | | Mono mode | OFF | | Calibration singal, Hz | 1000 | | Polarity | correct/correct |
Summary | Frequency response (from 40 Hz to 15 kHz), dB | +0.06, -0.52 | Good | | Noise level, dB (A) | -95.3 | Excellent | | Dynamic range, dB (A) | 96.0 | Excellent | | THD, % | 0.0012 | Excellent | | THD + Noise, dB (A) | -87.9 | Good | | IMD + Noise, % | 0.0048 | Excellent | | Stereo crosstalk, dB | -91.4 | Excellent | | IMD at 10 kHz, % | 0.0084 | Very good | | General performance |
| Excellent |
Frequency response | From 20 Hz to 20 kHz, dB | -0.93, +0.06 | | From 40 Hz to 15 kHz, dB | -0.52, +0.06 |
Noise level | Left | Right | | RMS power, dB | -94.5 | -94.0 | | RMS power (A-weighted), dB | -95.8 | -94.9 | | Peak level, dB FS | -82.3 | -82.4 | | DC offset, % | -0.0 | -0.0 |
Dynamic range | Left | Right | | Dynamic range, dB | +95.5 | +94.7 | | Dynamic range (A-weighted), dB | +96.5 | +95.5 | | DC offset, % | -0.00 | -0.00 |
THD + Noise (at -3 dB FS) | Left | Right | | THD, % | +0.0013 | +0.0011 | | THD + Noise, % | +0.0041 | +0.0041 | | THD + Noise (A-weighted), % | +0.0040 | +0.0040 |
Intermodulation distortion | Left | Right | | IMD + Noise, % | +0.0048 | +0.0049 | | IMD + Noise (A-weighted), % | +0.0044 | +0.0045 |
Stereo crosstalk | Left | Right | | Crosstalk at 100 Hz, dB | -93 | -93 | | Crosstalk at 1000 Hz, dB | -90 | -91 | | Crosstalk at 10000 Hz, dB | -73 | -72 |
IMD (swept tones) | Left | Right | | IMD + Noise at 5000 Hz, | 0.0066 | 0.0065 | | IMD + Noise at 10000 Hz, | 0.0081 | 0.0080 | | IMD + Noise at 15000 Hz, | 0.0104 | 0.0105 |
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发表于 2010-5-25 12:12
楼主
其实分离度更高的，被那音量控制给拉低了。
