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)

Spectrum graph

Left
Right
THD, %
+0.0010
+0.0010
THD + Noise, %
+0.0047
+0.0048
THD + Noise (A-weighted), %
+0.0042
+0.0042



Intermodulation distortion

Spectrum graph

Left
Right
IMD + Noise, %
+0.0057
+0.0058
IMD + Noise (A-weighted), %
+0.0050
+0.0050



Stereo crosstalk

Spectrum graph

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)

Spectrum graph

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



Spectrum graph

Spectrum graph

Spectrum graph