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I got a USB Behringer Uphoria UMC202HD for use with a laptop because it is 24 bits and 96 KHz and I wanted a portable system. And it has extremely low noise.
I still have a couple of Delta44s running on desktop systems.
However, even on the desktop PC, Optiplex 780, CFGSR will not connect (with softrock RX ensemble II) ) when the USB Behringer UMC202HD is plugged in. CFGSR works fine for softrock RX ensemble II with HDSDR and Winrad with other sound cards. (Delta 44, small Behringer 16 bit USB, etc)
I am running windows 10 pro which I keep updated. I don't know if this problem is due to windows 10 or some other software, e.g. astronomy software that was installed, or something else. I have tried rebooting with softrock and CFGSR only, (similar to what I had to do for the little vector network analyzer) and various permutations.
Suggestions appreciated.

On 16/06/2022 15:20, David Underwood wrote:

However, even on the desktop PC, Optiplex 780, CFGSR will not connect (with softrock RX ensemble II) ) when the USB the Behringer UMC202HD is plugged in. CFGSR works fine for softrock RX ensemble II with HDSDR and Winrad with other sound cards. (Delta 44, small Behringer 16 bit USB, etc)

David,
To be clear, on the desktop does the Softrock work when the Behringer is not plugged in?

If so it looks like a USB conflict. I would try all USB ports. Try a good hub.
What does device Manager show in both circumstances?

(24 bits will not improve performance without Softrock modification.)

73 Alan G4ZFQ

I am running windows 10 pro which I keep updated. I don't know if this problem is due to windows 10 or some other software, e.g. astronomy software that was installed, or something else. I have tried rebooting with softrock and CFGSR only, (similar to what I had to do for the little vector network analyzer) and various permutations.

Alan,
Thanks for the suggestion. It works.
By using one USB slot on the front of the computer and one on the back I got CFGSR and the Behringer to work together. It even works at 192 KHZ sample rate, so I can see at least 180 KHz wide on the waterfall. However, the noise level is a couple of db worse than the Delta 44, and both are about 10 db worse than I remember (some time ago) with the Delta44 and a little softrock lite 6.2 crystal receiver as a panadapter on an old icom USB -only radio.
So:
A) What did you mean by softrock modification? Is there a way to get the noise lower on the RX ensemble II?
B) I have large noise bumps every 60KHz across the spectrum. Could be from the big Monitor of the computer or a Class D audio amp. Lots to look at.
David
K0IMH

On 16/06/2022 20:36, David Underwood wrote:

A) What did you mean by softrock modification? Is there a way to get the noise lower on the RX ensemble II?

David,

The discussion was long ago, before the Ensemble.
But basically involved reducing the opamp gain. It may have made a difference in extreme cases but the dynamic range of 16 bits may be better than many modern SDRs with 12 bit ADCs.

B) I have large noise bumps every 60KHz across the spectrum. Could be from the big Monitor of the computer or a Class D audio amp. Lots to look at.

Best of luck with that! There are so many potential interference sources.

73 Alan G4ZFQ

David,
I am not sure what you meant by "However, the noise level is a couple of db worse than the Delta 44". Did you mean the noise floor of the Behringer USB DAC vs. the Delta 44's noise floor, which would have nothing to do with the noise floor of the Ensemble?
If so, then your USB ADC/DAC is really very good! Likely the noise from the Ensemble with a decent antenna will be significantly higher than the Behringer sound card, so the sound card's noise is not degrading the system.
If I have misunderstood, please clarify.
73,
Roger