Topic: -95 db RMS noise on Analog in 1&2

Sorry to have to bring this up.  I've read almost all the previous threads. I have taped the case to prevent metal to metal contact and than doesn't work.

AIO non Pro, about a year ago I purchased this card (used).  I also bought the analog in and out extension cards which are installed. I use it specifically in DAW mode (with Cubase).  I didn't notice this problem until just recently.  I happened to be monitoring my sound in a way that I normally wouldn't when I saw the Analog 1 and 2 meters bouncing around between -85 and -95 db in TotalMix.  In Cubase when I have those "ins" activated I get a -72 to -85 reading.  The only thing that seems to have some effect is if I set the Input Level to "Lo Gain" in the Hammerfal DSP settings, then the readings flucutate between -96 to -101.

Where do I start and what do I do?  For now I've just deactivated 1&2 in Cubase and hope there isn't any bleed while deactivated.

Go easy on me since I'm bit of a beginner here.

2

Re: -95 db RMS noise on Analog in 1&2

Your TotalMix numbers are peak values, RMS is much lower. Means your analog inputs are better than -105 dB rms unweighted. Super low noise, better than CD (-96 dB). Nothing wrong with that.

And this has no relation to grounding issues with case isolation for analog outputs.

Regards
Matthias Carstens
RME

Re: -95 db RMS noise on Analog in 1&2

Thank you.  This is the first "Pro" level audio interface I've ever owned and once I started poking around I became concerned when I see my meters moving when there is nothing there.  Like you said, they are very low and not to be concerned with but at first blush it got me questioning what I was looking at.

4

Re: -95 db RMS noise on Analog in 1&2

Noise and hum on a very low level. If you connect something to these analog inputs you wil see much higher levels - noise and hum from the connected source, but typically still not audible.

Regards
Matthias Carstens
RME

Re: -95 db RMS noise on Analog in 1&2

Hi Matthias,

have same issue as original poster. Recognized this kind of sound after I installed my new purchased Osmose Synthi direct to HSDPe AIO Analog Input via TSR->XLR Cable.

These noises and hum are hearable when I turn the volume of the monitor/headphone to near to max. It sounds like morse-code....

Here are some pictures with different input level settings.

with -10dBV:

https://i.gyazo.com/e0c9d80aae733209c42b766072784274.png

with Lo Gain:

https://i.gyazo.com/95ef0166f9574c0a40e4e94c13701b53.png

Any idea how to fix this kind of noises?

6

Re: -95 db RMS noise on Analog in 1&2

Remove pin 1 connection on one side of the XLR cables.

Regards
Matthias Carstens
RME

7 (edited by waedi 2025-01-30 09:46:26)

Re: -95 db RMS noise on Analog in 1&2

The Osmose jack sockets are pseudo-balanced, whatever that may be.

https://i.ibb.co/sv4J7YBm/TS.jpg

Beeter use TS not TRS cables ?

https://thumbs.static-thomann.de/thumb/padthumb600x600/pics/bdb/_12/124418/7038471_800.jpg

M1-Sequoia, Madiface Pro, Digiface USB, Babyface silver and blue

Re: -95 db RMS noise on Analog in 1&2

For the record... mine is showing this "noise" without anything connected to Analog "IN" 1 or 2.  I have even disabled it in the WDM Devices setup.

9 (edited by realTIMematrix 2025-01-31 00:59:07)

Re: -95 db RMS noise on Analog in 1&2

MC wrote:

Remove pin 1 connection on one side of the XLR cables.

How can I remove the Pin 1 Connection?

I purchased the cable from Thoman and this is what they recommend me to connect the OSMOSE to HSDPe AIO

https://www.thomann.co.uk/cordial_cfm_3 … _kabel.htm

Cable: Cordial CFM 3 MV

10

Re: -95 db RMS noise on Analog in 1&2

The Osmose's line outputs are 'pseudo-balanced', most probably that means 'impedance balanced', which then means pin 1 can not be disconnected.

That said isn't what you see in DigiCheck the Osmose itself? The unavoidable self- noise of the instrument?

Regards
Matthias Carstens
RME

11 (edited by waedi 2025-01-31 21:22:59)

Re: -95 db RMS noise on Analog in 1&2

realTIMematrix wrote:

Hi Matthias,

have same issue as original poster. Recognized this kind of sound after I installed my new purchased Osmose Synthi direct to HSDPe AIO Analog Input via TSR->XLR Cable.

These noises and hum are hearable when I turn the volume of the monitor/headphone to near to max. It sounds like morse-code....

Here are some pictures with different input level settings.

with -10dBV:

https://i.gyazo.com/e0c9d80aae733209c42b766072784274.png

with Lo Gain:

https://i.gyazo.com/95ef0166f9574c0a40e4e94c13701b53.png

Any idea how to fix this kind of noises?


Yes, LoGain Input Level is the right setting then everything is fine.
There is some noisefloor wich is normal.
You can't hear it, only dedicated measurement tools (like Digicheck) can measure it.

M1-Sequoia, Madiface Pro, Digiface USB, Babyface silver and blue

Re: -95 db RMS noise on Analog in 1&2

Hi,

when I turn the Osmose ON everything is fine. I don't know why the system shows huge peaks when the device is not powered or off. I don't understand the logic behind that issue.

Anyway, does external interfaces like the Fireface are better than internal PCIe Cards?

Re: -95 db RMS noise on Analog in 1&2

It probably catches various signals from the air when Osmose is off.

FF UCX II, Digiface USB, Babyface Pro FS

14

Re: -95 db RMS noise on Analog in 1&2

Outputs are 'open' connections when unpowered, so the following inputs take lots of noise from everywhere. When powered on the outputs are low impedance, comparable to shorting them. Then only the Osmose self-noise is present.

Regards
Matthias Carstens
RME

Re: -95 db RMS noise on Analog in 1&2

Easto wrote:

For the record... mine is showing this "noise" without anything connected to Analog "IN" 1 or 2.  I have even disabled it in the WDM Devices setup.

Noise happens without the Osmose connected, ok, but what means disabled in wdm ? This should not have any influence on the inputs noisefloor, right ?

M1-Sequoia, Madiface Pro, Digiface USB, Babyface silver and blue

Re: -95 db RMS noise on Analog in 1&2

MC wrote:

Outputs are 'open' connections when unpowered, so the following inputs take lots of noise from everywhere. When powered on the outputs are low impedance, comparable to shorting them. Then only the Osmose self-noise is present.

Ok, that explains why I receive noise even if the Osmose is not powered. Thank you

17 (edited by realTIMematrix 2025-02-05 15:11:34)

Re: -95 db RMS noise on Analog in 1&2

Hi guys,
just want to let you know that my issue is fixed with an Y-Kabel for USB https://expressivee.happyfox.com/kb/art … e-y-cable/ that ExpressiveE sell.

As soon as I connect the Y-Cable to my computer the noise complete disappear from my Osmose.
Even when the device is fully turned off.
Still have very, very low PEAK/RMS Levels but you can't hear anything on the speaker/headphones.

https://i.gyazo.com/8d5e22ccc401c0d8fe3eec8532f1df09.png

So happy now.
Thank you all for your support.