RMAA Measurements for E-MU 1212M PCI

[ezkcdude]

I recently installed the 1212M, actually with the intention of using it for a measurement instrument, not playback. However, since I know you head-fiers love information excess, I thought I would post the results of an analog loopback test using RMAA. If you dig around hard enough, you could find similar results using google, but why go to that effort, right?

Well, here are the results. Enjoy! (And BTW, other than the very slight rolloff at 20 kHz - 0.2 dB - it's a great card, in terms of specs.)

RMAA Summary

Frequency Response

Noise

IMD Swept

IMD

Dynamics

Stereo Crosstalk

Patchmix Levels

RMAA Levels

 

[Ahriman4891]

There is something wrong with your graphs. Where is all the noise from the insides of the computer?

 

[JSTpt1022]

Any idea if it measures differently when tested in 16bit 44.1?

Edit: I know there has to be some difference in performance, I actually meant how differently.

 

[ezkcdude]

Quote:

Originally Posted by JSTpt1022 /img/forum/go_quote.gif Any idea if it measures differently when tested in 16bit 44.1? Edit: I know there has to be some difference in performance, I actually meant how differently.

Of course, there is a difference. The dynamic range of 16 bits is much lower. If you really want to know the performance, you must do 24-bit measurement. Now, whether the frequency is 44.1, 96, or 192 doesn't make as much of a difference.

Because you asked, though:

Testing device E-DSP Wave [DF00]
Sampling mode 16-bit, 192 kHz
Interface MME
Testing chain External loopback (line-out - line-in)
RMAA Version 6.0.5

Frequency response (from 40 Hz to 15 kHz), dB
+0.01, -0.09 Excellent
Noise level, dB (A)
-102.8 Excellent
Dynamic range, dB (A)
102.9 Excellent
THD, %
0.0010 Excellent
THD + Noise, dB (A)
-94.4 Very good
IMD + Noise, %
0.0025 Excellent
Stereo crosstalk, dB
-100.1 Excellent
IMD at 10 kHz, %
0.0034 Excellent
General performance
Excellent

The measurements are still excellent, but they represent only what can be measured using 16-bits. If you can measure with 24 bits, you should. Ok?

 

[ezkcdude]

Quote:

Originally Posted by Ahriman4891 /img/forum/go_quote.gif There is something wrong with your graphs. Where is all the noise from the insides of the computer?

Yeah, makes you wonder what all the fuss is about, right? I've seen results with a modded version of the E-MU where they got the noise down to 150 dB! Nothing wrong with that, eh?