Test & Measurement interface for Soundcard

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#362
I have also been able to duplicate Pete's results with the Maudio card and a EMU404. I have since upgraded to the 1616m (actually a 1212m) to drop the noise floor even further when I measure without the interface. The 1616m has a noise floor at -150dB.

I have always used a balanced connection between the sound Card and Interface. Single Ended has alot more noise, particularly with 60Hz.
 
#364
Your right, they are different, I was confusing the base 1010m card. The 1616m has the same 1010m PCI card but instead of the daughter board it has the seperate 1616m box that connects via a 10baseT cable.

Forgive my error was up late last night.
 
#369
AndrewL said:
Very odd, I don't know how many Pete has sold, I would guess by this thread a fair few, so, as you say, it seems very odd that only one person has found this problem.
Click to expand...

Not all that surprising - BIOS controlled (MOSFET switch controlled) power on USB ports is a new feature that I have only seen in i7 chipsets, and these have only been availalble for maybe 6 months and only on high end machines. Pretty much all desktops up to now did not control the USB power, even though the spec says 500ma they can provide several amps at least, since they are protected by little to nothing - maybe a polyfuse, maybe an unprotected MOSFET switch, maybe a PCB trace.

Sleep and charge is rolling out to both desktops and laptops in the i7 chipset. It would be interesting to know if anyone was using an i7 Toshiba desktop (if Tos even makes desktops anymore) and if this works with their machine. Maybe mine is just cranky.

Mark
 
#370
dont suppose you have any more of these boards left Pete? I know i'm late to the party, came across this thread real early in the piece and got sidetracked (plus if i'm honest I wasnt really ready for this back then), seems everyone is pretty happy with performance, so i'm in. hope youve got one left
 
#375
Hello Gents,
I am in a similar condition. I have the 1212M including daughter card installed in a dedicated PC sitting my surplus Herman Miller desk / electronics workbench.
I have cords with plugs soldered on to go between the Millett Interface and the 1212M Input and Output. I have a cord with mini-clips on one end and BNC on the other for the input to the interface. AudioTester is installed. All of that sort of works. The E-Mu mixer software is not straight forward at least to me. There is a default setting for RMAA that works at 16 bit and 44.1 KHz. I have not taken the time to sort out higher settings. Now that the leaves are mostly off the trees I should sit down and sort out the higher settings.
DT
All just for fun!
 
#376
Hey DT,
If your 1212M uses the PatchMix software to control the card you will have a few frustrating moments trtying to get Audiotester to switch bit depth and sample rate. In Audiotester switch to something other than ASIO on the inputs and outputs. Then set up the soundcard the way you want it. Then go back to Audiotester and select the ASIO at the soundcards set-up parameters. You my have to link the input and outputs together on Audio tester and then make the switch.
And no the software is not intuitive at all.
Scott
 
#377
SGregory said:
Hey DT,
If your 1212M uses the PatchMix software to control the card you will have a few frustrating moments trtying to get Audiotester to switch bit depth and sample rate. In Audiotester switch to something other than ASIO on the inputs and outputs. Then set up the soundcard the way you want it. Then go back to Audiotester and select the ASIO at the soundcards set-up parameters. You my have to link the input and outputs together on Audio tester and then make the switch.
And no the software is not intuitive at all.
Scott
Click to expand...

Hello Scott and Gents,
I have the bench top clear save the computer monitor, keyboard and mouse. As far as I can tell the guts of the 1616M and 1212M are the same including the E-MU PatchMix software. I am ready to jump into the deep end, frustrations and all. Scott thank you for the hard learned insights.
The last time I had this thing running I used the PatchMix pre-programmed RMAA 16, 44.1 panel selection. I tested an Aikido ACF buffer line amplifier. Things seemed to work well to a point. PatchMix pre-programmed RMAA 16, 44.1 panel selection. Today I noticed that the PatchMix has pre-programmed RMAA panel selections for the higher sampling rates as well.
In an effort to put a handle on this I will break it into pieces. (The teacher in me needs to do this.)
1. The physical connections from the sound card to the Interface then to the DUT.
2. The how’s and why’s and of the switch positions at the Interface.
3. The E-MU PatchMix settings for various bit depths and sample rates.
4. The AudioTester settings for various bit depths and sample rates. Items 3 and 4 are tied together.
5. Learn to save AudioTester output screens to post to DIYAudio.
To do all this I think that I will test a discontinued stupid little $20.00 Class T amplifier I just bought from Parts-Express. I do not want to post bad data about some circuit near and dear to someone even me. No big hurry either. Yes I know it has all been done before and all is vanity.
DT
All just for fun!
 
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