This discourse with Praxis Measurement System USB sound card is posted three months ago, posted because Liberty Instrument NET MTV alert this Zhang card matching Pen TV, M-Audio 專 professional field of Qi, product Ying this not want bad, although product is seven or eight years ago. Following is a icelin experience:
優 bit:
1. Stadium equivalent of small
2. Guang Jian input access
Missing bit:
1. by in is old of production products, this Zhang card only support USB 1.1, maximum of not full is although so Hao airport 96kHz/24bits, not over was is to in half Tri-workers Xia to Prada to 96kHz, is said, only in Bo put and DVD sound in the choose a open zone, if tri-to with when open zone, entering into highest only support 48kHz/24bits, although said not shadow 響 sound frequency measured volume, Director has Shang when of sense worth.
2. Pricing not 競 fight force, with about USD$100 of charge rather than bought Amazon is jumping/f Auction, as long as the EMU 0202 USD$89.
3. the specifications that I'm poor, hence, EMU 0202 but Hao Airport A/D D/A has SNR>112dB the fact and take model courses rates up to 192 kHz, all head 鍍 gold, specifying full sheng.
Sure then, this short little is done with imaginary enemies EMU 0202 comparison, or said Transit've ˋ standard sound card is enough water, especially when he has s/PDIF input. NET the way some people when Zhang card into this PC audio on, use only the Line-out operation in 96kHz, not over the THD is not too ideal, maybe over the circuit modified to improve in the future.
With RMAA measured and have empathy for numerical data, measured general terms: the Line out->Line in loopback
RightMark Audio Analyzer test report
| Testing device | Transit USB Out 1/2 |
| Sampling mode | 24-bit, 48 kHz |
| Interface | MME |
| Testing chain | External loopback (line-out - line-in) |
| RMAA Version | 6.2.3 |
| 20 Hz - 20 kHz filter | ON |
| Normalize amplitude | ON |
| Level change | -0.1 dB / 0.0 dB |
| Mono mode | OFF |
| Calibration singal, Hz | 1000 |
| Polarity | correct/correct |
Summary
| Frequency response (from 40 Hz to 15 kHz), dB |
+0.03,-0.01
|
Excellent
|
| Noise level, dB (A) |
-93.9
|
Very good
|
| Dynamic range, dB (A) |
93.8
|
Very good
|
| THD, % |
0.0010
|
Excellent
|
| THD + Noise, dB (A) |
-87.5
|
Good
|
| IMD + Noise, % |
0.0057
|
Excellent
|
| Stereo crosstalk, dB |
-94.0
|
Excellent
|
| IMD at 10 kHz, % |
0.0059
|
Excellent
|
| General performance |
Very good
|
Frequency response
| From 20 Hz to 20 kHz, dB |
-0.07, +0.04
|
| From 40 Hz to 15 kHz, dB |
-0.01, +0.03
|
Noise level
|
Left
|
Right
|
|
| RMS power, dB |
-92.7
|
-92.7
|
| RMS power (A-weighted), dB |
-93.9
|
-93.9
|
| Peak level, dB FS |
-77.3
|
-75.6
|
| DC offset, % |
-0.0
|
-0.0
|
Dynamic range
|
Left
|
Right
|
|
| Dynamic range, dB |
+92.7
|
+92.7
|
| Dynamic range (A-weighted), dB |
+93.9
|
+93.8
|
| DC offset, % |
-0.00
|
-0.00
|
THD + Noise (at -3 dB FS)
|
Left
|
Right
|
|
| THD, % |
+0.0010
|
+0.0010
|
| THD + Noise, % |
+0.0047
|
+0.0048
|
| THD + Noise (A-weighted), % |
+0.0042
|
+0.0042
|
Intermodulation distortion
|
Left
|
Right
|
|
| IMD + Noise, % |
+0.0057
|
+0.0058
|
| IMD + Noise (A-weighted), % |
+0.0050
|
+0.0050
|
Stereo crosstalk
|
Left
|
Right
|
|
| Crosstalk at 100 Hz, dB |
-92
|
-93
|
| Crosstalk at 1000 Hz, dB |
-93
|
-93
|
| Crosstalk at 10000 Hz, dB |
-81
|
-80
|
IMD (swept tones)
|
Left
|
Right
|
|
| IMD + Noise at 5000 Hz, |
0.0058
|
0.0059
|
| IMD + Noise at 10000 Hz, |
0.0058
|
0.0060
|
| IMD + Noise at 15000 Hz, |
0.0059
|
0.0058
|
