ground noise with Cubase Pro 9

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lhtlueders
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ground noise with Cubase Pro 9

Post by lhtlueders » Tue Aug 29, 2017 6:55 pm

Hi List,

after opening the Cubase I do have some ground noise / main hum only appearing while cubase is running. After Cubase is shut down the PC is 100% quiet. Any idea where this could be coming from? Is maybe a denoiser or dehummer a solution? Do you have any suggestions which one is working ok with Cubase in the lower pricerange as well as low latency?
Any idea if such a plugin will be included in any upcoming Cubase Pro Versions e.g. 9.5 / 10?

Thanks for your Support
Lars from germany
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Re: ground noise with Cubase Pro 9

Post by Grim » Tue Aug 29, 2017 7:21 pm

You need to solve this at source, not with a de-humming plugin.

Audio device?? Driver? Computer type? - Much else connected to the computer?
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Re: ground noise with Cubase Pro 9

Post by Raphie » Tue Aug 29, 2017 7:24 pm

If a laptop can you unplug power?
If a usb sounddevice your desktop PC needs to be grounded.
If it's a hum, it can also be a feedback loop.
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Re: ground noise with Cubase Pro 9

Post by Stephen57 » Wed Aug 30, 2017 2:27 am

A ground loop is a "loop of wire" that is not grounded. So, often, it's a simple matter of removing one thing at a time to find the culprit. Be careful and protect your speakers when doing this. There's a lot of info on the web about how to isolate and eliminate ground loops, but, again, be careful, and read up on this topic before attempting to correct the situation. Ultimately you may need an isolation transformer, etc., but often the issue is a bad cable or an incorrectly grounded piece of equipment in the signal path. Good luck.
-------------------------------------------------------
DAW: Cubase Pro 10 (Main), Cubase Pro 9.5 (Backup); PC: HP Z230, i5 CPU quad-core 3.5 Ghz, 16 Gigs RAM; OS: Win 7 Pro 64-bit; Audio Converters, Scarlett 2I4, Zoom UCR-8; USB MIDI Controller, Akai Advance 49. VST-Is: Spectrasonics Omnisphere 2.5, Stylus RMX; Air Music: Hybrid, Transfuser 2, Vacuum Pro, Velvet, Xpand2; Novation: Bass Station; Sonovox Grand Piano; Rack: Proteus 2000, Korg 03R/W, Yamaha TG 33. Monitoring with KRK Rokit 8/G3, Tannoy PBM 6.5 II, Mics. Scheops, Sennheiser, Rode, Lectrosonics RF, etc.

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Re: ground noise with Cubase Pro 9

Post by lhtlueders » Thu Sep 07, 2017 7:58 pm

Hi, I've now worked on some solution options e.g. connection ALL studio devices into the same plug and seperating a second PC which is not mandatory for the daily studio sessions: And it helped eleminating some of the ground noises and the (now little) noise is now always the same no matter cubase or any other programs are running or not. BUT:!!! There's still some noises while the system is running. Maybe it's normal, because I can only hear it when I turn my monitors to the very maximum. Is there an average figure how much noise a "normal" studio setup is making while eg cubase is running but not actually playing? My soundcard RME HDSPe AIO is providing a tool called DIGI Check. So I've made a screenshot of the noise. Maybe someone could tell me if the remaining noise is not normal average and an option to further reduce it? Thanks for all the help.
ground noise.png
(86.25 KiB) Not downloaded yet
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Re: ground noise with Cubase Pro 9

Post by rchaisse » Thu Sep 07, 2017 9:50 pm

Hi ihtlueders,
Please, permit me to help you with your noise problem.
First off, I'm a bit concerned about when you say 'I can only hear it when I turn my monitors to the very maximum'.
Are these powered monitors, or speakers with an external power amp?
Do you have an external mixing board or are you coming directly out of your computer to the Amplifier/ Speakers?
Once I have that information, I can give you advise on how to clean up your system.
Rick
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Re: ground noise with Cubase Pro 9

Post by paulb » Fri Sep 08, 2017 10:11 am

A good alternative to grounding your analogue connections is to use fibre ADAT or SPDIF connections from your audio interface.

If that option is available to you your digital noise problems may well disappear, as there is no electrical ground to loop. The integrity of your digital audio data will be 100%.

I've had a number of desktop and lap-tops which have introduced terrible levels of noise into my audio. Cheap PSUs and general poor internal component screening are major culprits, but the total lack of mains ground on most lap-top PSUs is often significant too. Un-balanced audio connections don't help much either.

It's often less about 'hum' and more about a 'roar' of bleeps hisses and burbles.

Give it a try - it's been a 'free' cure for me on multiple occasions.
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Re: ground noise with Cubase Pro 9

Post by Buzz » Fri Sep 08, 2017 11:39 am

Does one of your display monitors have a VGA cable? For me, DVI and HDMI are fine, but as soon as I use VGA I have a noise problem.
Higher quality VGA cable solved it.
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Re: ground noise with Cubase Pro 9

Post by lhtlueders » Fri Sep 08, 2017 12:42 pm

rchaisse wrote:
Thu Sep 07, 2017 9:50 pm
Hi ihtlueders,
Please, permit me to help you with your noise problem.
First off, I'm a bit concerned about when you say 'I can only hear it when I turn my monitors to the very maximum'.
Are these powered monitors, or speakers with an external power amp?
Do you have an external mixing board or are you coming directly out of your computer to the Amplifier/ Speakers?
Once I have that information, I can give you advise on how to clean up your system.
Rick
Hi Rick, I use speakers with an external power amp (ALT OUT of my mixing desk) and I use an external mixing board (A&H ZED14). So from the analog out of my soundcard the signal goes into the ZED14. There it'll be mixed with some of my other synths and then the Rec Out goes back into the analog in of my soundcard.
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Re: ground noise with Cubase Pro 9

Post by lhtlueders » Fri Sep 08, 2017 1:13 pm

paulb wrote:
Fri Sep 08, 2017 10:11 am
A good alternative to grounding your analogue connections is to use fibre ADAT or SPDIF connections from your audio interface.

If that option is available to you your digital noise problems may well disappear, as there is no electrical ground to loop. The integrity of your digital audio data will be 100%.

I've had a number of desktop and lap-tops which have introduced terrible levels of noise into my audio. Cheap PSUs and general poor internal component screening are major culprits, but the total lack of mains ground on most lap-top PSUs is often significant too. Un-balanced audio connections don't help much either.

It's often less about 'hum' and more about a 'roar' of bleeps hisses and burbles.

Give it a try - it's been a 'free' cure for me on multiple occasions.
I use the A&H ZED14 which has no ADAT or SPDIF connections (my soundcard has). Is there a way to route the audio signal internal without going through the mixing desk and just routing the external synths through the A&H ZED14 merging all in my RME HSPe AIO? But maybe the noise will remain?
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Re: ground noise with Cubase Pro 9

Post by SafeandSound » Fri Sep 08, 2017 3:11 pm

I have an RME HDSP 9632 and I also have a problem with high background noise through the cards built in analogue outputs. (unbalanced on my home music system). I researched a little and found numerous reports of high background noise with these RME slot cards, you can find various attempts to resolve it, insulating it form the PC chassis etc.. I contacted RME support and they said you have a ground loop. They suggested trying headphone amp to determine if it was the rsult of the equipment it was connected to. This was inconclusive as the HP output at FULL is still low gain... fairly sure I still heard low level noise. There should be totally zilch noise given the card is supposed to be "SNR 110 dB RMS unweighted, 113 dBA".


I put a DAC on the SP/DIF output (which has superior fidelity) and I work like that, high noise floor has gone as it is isolated by the digital data stream, this DAC also connected unbalanced to the same mixer inputs as the RME was. The noise floor consisted of changing warbles and a type of hum that changed depending on what the computer was doing (i.e loading a project, mouse movements etc). There was some reported issues in combination with modern PSU's over at Gearslutz. Specifically Seasonic X series. (which I have in this machine) The issue is possibly related to the PWM (pulse width modulation) of the PSU voltage rails as part of the efficiency drive with PSU's. This is not what I expected for an overpriced, aging PCI card.

I purchased one as RME keep the drivers for Win10 up to date, it is nice and stable.

I could try putting my old PSU back in or trying the balanced cables you can buy, isolating it etc. etc. and seeing if anything changes but have not the time and solved it by using an external DAC. I have not been partcularly impressed. Previosuly I had an old Layla 3G in that was deathly silent, same PCI slot. I changed it because there was a driver issue that was infrequent and unpredictable with W10. I preferred not to have to deal with that and so treated myself to the RME card.

So whilst I cannot narrow down the specific issue (time, inclination, sorted it out with external DAC) I am still left feeling disappointed that my first RME experience was not as expected. I hope you get to the bottom of the problem. At some stage when I have time I might investigate it more but for now it is a non issue due to use of external DAC.
Last edited by SafeandSound on Fri Sep 08, 2017 3:24 pm, edited 1 time in total.
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Re: ground noise with Cubase Pro 9

Post by Nickeldome » Fri Sep 08, 2017 3:23 pm

lhtlueders wrote:
Fri Sep 08, 2017 1:13 pm
I use the A&H ZED14 which has no ADAT or SPDIF connections (my soundcard has). Is there a way to route the audio signal internal without going through the mixing desk and just routing the external synths through the A&H ZED14 merging all in my RME HSPe AIO? But maybe the noise will remain?
Why don’t you do it the other way around? Feed the signal of the ZED14 output into your RME soundcard and also connect your speakers to the RME? To me it makes no sense to first feed it into the ZED14 and then return it to the RME again. If anything it will add more noise to chain and possibly more issues like unwanted (ground) loops and added distortion? It’s also advisable to use ‘balanced’ cables as much as possible. Synths are usually don't have balanced connectors so they don’t matter that much but powered speakers certainly do and it’s very important to connect these with balanced (XLR) cables. Hope this helps?
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Re: ground noise with Cubase Pro 9

Post by SafeandSound » Fri Sep 08, 2017 3:38 pm

This may or may not help. When you pay top dollar for a basic I/O you tend to just expect it to work (balanced or unbalanced) connected to a basic system where other basic I/O has previously worked silently and noise free. Layla3G and my DAC audio works "A OK" immediately, balanced or unbalanced outputs, not having to jump through hoops (loops ?)

https://www.gearslutz.com/board/music-c ... ssues.html

Clearly this series of card/s has been very successful and seems to have worked for the vast majority of people. However given its
age it is not beyond the realms of possibility that it may not be compatible with every new item of PC hardware that subsequently exists since
the cards design/last hardware revision. Just have to work through it if/when you have time and inclination to try and troubleshoot the issue.
Home music making machine : Windows 10 (64bit), Cubase 9.0.2, RME HDSP 9632 PCI, 16GB HyperX 1333MHz, Intel i7-2600 3.4GHz, ASUS P8H61-M LE/USB3, Seasonic X-650 PSU, Radeon HD5450 PCI-E, Samsung 850Pro 256GB SSD (LatencyMON checked, memory tested, latest BIOS/drivers, no cracks, DAW only clean install to SSD) Mastering Engineer Barry Gardner

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Re: ground noise with Cubase Pro 9

Post by Stephen57 » Fri Sep 08, 2017 4:24 pm

First, I need to say that nothing I've posted here should be construed as technical advice. Whatever you do is at your own risk. If you want equipment serviced, seek the services of a qualified electronic equipment technician and, if necessary, a licensed electrician.

Noise is going to be introduced with each piece of equipment and identifying its cause, reducing it or eliminating it can be tricky, dangerous, time consuming and costly. Making a studio space more quiet is usually possible.

Noisy fans and A/C power supplies, buzzing guitar amps, anything and everything can induce noise at numerous points in the signal chain. Taking a step back, the room itself my not be being fed correctly grounded A/C. BE CAREFUL. If you you don't know how electricity works, don't monkey around with it. You can get a basic circuit tester which plugs in and gives basic readings -- good enough in most cases. Assuming you have clean power at the source, then follow each piece of equipment, step by step and see what noise appears on your meters and monitors, if any. Once all the components are connected, you'll know what your setup's noise floor is. Will that noise floor be acceptable? In some cases, yes. The level is low enough that it is covered by the recorded tracks. In other cases, it is unacceptable and noise is being recorded on your tracks -- buzz on the vocal track. Perhaps you need several setups. Some for recording, others for mixing. Once tracks are recorded, you can pull noise-generating equipment (turn off or unplug instruments, disconnect equipment from the patchbay), remove what you do not need from the signal chain to get rid its noise.

Look for things that create A/C line noise other than your recording equipment. Lighting fixtures, cable TV boxes, appliances on the same circuit may induce noise on the line. Perhaps one of your computer's is not correctly grounded? If possible a dedicated "home run" circuit or circuits is best. I use an eight outlet A/C distribution box that feeds everything I'm currently using -- a modest setup. In the studio room, we have two dedicated circuits -- "home runs to the box." Listen to your space because sometimes the noise you're hearing is an acoustical sound in the room and not in the electronics. Do a sweep frequency listen -- lows, low-mids, mids, highs -- and look for where the noise is, don't disregard what's there. Often it will be the typical 60 or 50 cycle hum, but sometimes not. I've heard squeals, clicks, pops, LFO sweeps -- noise comes in many strange forms.

Anyway, it sounds like you're doing a lot of this kind of work and getting things sorted out. It's tricky, but not complicated. It can be time consuming, costly and dangerous, so, again, if you're not sure, ask a qualified expert for help. D.I.Y. is fine, D.I.Died sucks. :-) It's really easy to fry your speaker drivers, a piece of equipment, or yourself when working with your A/C feeds. There's a lot of detailed info on the net, of course, and I look forward hearing what others have to offer on this thread and topic. Good luck.
-------------------------------------------------------
DAW: Cubase Pro 10 (Main), Cubase Pro 9.5 (Backup); PC: HP Z230, i5 CPU quad-core 3.5 Ghz, 16 Gigs RAM; OS: Win 7 Pro 64-bit; Audio Converters, Scarlett 2I4, Zoom UCR-8; USB MIDI Controller, Akai Advance 49. VST-Is: Spectrasonics Omnisphere 2.5, Stylus RMX; Air Music: Hybrid, Transfuser 2, Vacuum Pro, Velvet, Xpand2; Novation: Bass Station; Sonovox Grand Piano; Rack: Proteus 2000, Korg 03R/W, Yamaha TG 33. Monitoring with KRK Rokit 8/G3, Tannoy PBM 6.5 II, Mics. Scheops, Sennheiser, Rode, Lectrosonics RF, etc.

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Re: ground noise with Cubase Pro 9

Post by Stephen57 » Fri Sep 08, 2017 4:41 pm

SafeandSound wrote:
Fri Sep 08, 2017 3:38 pm
This may or may not help. When you pay top dollar for a basic I/O you tend to just expect it to work (balanced or unbalanced) connected to a basic system where other basic I/O has previously worked silently and noise free. Layla3G and my DAC audio works "A OK" immediately, balanced or unbalanced outputs, not having to jump through hoops (loops ?)

https://www.gearslutz.com/board/music-c ... ssues.html

Clearly this series of card/s has been very successful and seems to have worked for the vast majority of people. However given its
age it is not beyond the realms of possibility that it may not be compatible with every new item of PC hardware that subsequently exists since
the cards design/last hardware revision. Just have to work through it if/when you have time and inclination to try and troubleshoot the issue.
Excellent thread over there. It's going to be vexatious when there's system noise issue with the internal components. I've been lucky and am not suffering these kinds of noise issues. That goes all the way back to 2014. I've not read it all, but there may be some useful posts there.
-------------------------------------------------------
DAW: Cubase Pro 10 (Main), Cubase Pro 9.5 (Backup); PC: HP Z230, i5 CPU quad-core 3.5 Ghz, 16 Gigs RAM; OS: Win 7 Pro 64-bit; Audio Converters, Scarlett 2I4, Zoom UCR-8; USB MIDI Controller, Akai Advance 49. VST-Is: Spectrasonics Omnisphere 2.5, Stylus RMX; Air Music: Hybrid, Transfuser 2, Vacuum Pro, Velvet, Xpand2; Novation: Bass Station; Sonovox Grand Piano; Rack: Proteus 2000, Korg 03R/W, Yamaha TG 33. Monitoring with KRK Rokit 8/G3, Tannoy PBM 6.5 II, Mics. Scheops, Sennheiser, Rode, Lectrosonics RF, etc.

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Re: ground noise with Cubase Pro 9

Post by rchaisse » Fri Sep 08, 2017 11:38 pm

Hi lhtlueders,
I can't believe it!
I wrote you out a step by step method to locate and correct your hum problem and somehow it has disappeared.
I had even checked it after submission.
What I DIDN'T do is copy and past it into a text document as a back-up.
So Sorry!
If you still need assistance let me know and I'll re-write it.
At the moment, I just don't have the time.
Rick
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Re: ground noise with Cubase Pro 9

Post by Stephen57 » Sat Sep 09, 2017 1:18 am

rchaisse wrote:
Fri Sep 08, 2017 11:38 pm
Hi lhtlueders,
I can't believe it!
I wrote you out a step by step method to locate and correct your hum problem and somehow it has disappeared.
I had even checked it after submission.
What I DIDN'T do is copy and past it into a text document as a back-up.
So Sorry!
If you still need assistance let me know and I'll re-write it.
At the moment, I just don't have the time.
Rick
Arggg! I was looking for your post. It's possible to "save drafts" on the board. In the article mentioned above there's some good posts about this particular issue. There's also some possible solutions posted for it. It seems to be a component level noise issue.
-------------------------------------------------------
DAW: Cubase Pro 10 (Main), Cubase Pro 9.5 (Backup); PC: HP Z230, i5 CPU quad-core 3.5 Ghz, 16 Gigs RAM; OS: Win 7 Pro 64-bit; Audio Converters, Scarlett 2I4, Zoom UCR-8; USB MIDI Controller, Akai Advance 49. VST-Is: Spectrasonics Omnisphere 2.5, Stylus RMX; Air Music: Hybrid, Transfuser 2, Vacuum Pro, Velvet, Xpand2; Novation: Bass Station; Sonovox Grand Piano; Rack: Proteus 2000, Korg 03R/W, Yamaha TG 33. Monitoring with KRK Rokit 8/G3, Tannoy PBM 6.5 II, Mics. Scheops, Sennheiser, Rode, Lectrosonics RF, etc.

Help with Cubase:
Documentation: https://steinberg.help/
Location/file paths of presets in Cubase and Nuendo: https://helpcenter.steinberg.de/hc/en-u ... nd-Nuendo-
Preferences: https://helpcenter.steinberg.de/hc/en-u ... and-Nuendo

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Re: ground noise with Cubase Pro 9

Post by rchaisse » Sat Sep 09, 2017 4:14 am

Let me try again..

First, I'm going to assume that you're not getting shocked from touching any metal on any of your components.
Just to be sure, you can pick up an electrical outlet tester at the hardware store that will glow green ( or amber) if the outlet is wired properly and the ground is functioning as it should. I would also recommend you pick up 4 to 6 ground-lifts. (see below) they come in very handy in audio environments such as stage and studio.

Also, your DAW, Mixer and Amplifier ( and other connected equipment ) should all be plugged into the same electrical outlet using a good surge protector ( at least 1000 joules ) or better yet, an A/C line conditioner. I highly recommend Furman PL-PLUS C 15 Amp Power Conditioner. Amazon sells for $239.00
I can't rave enough about it.. read the reviews.

Anyway, back to your hum...

Always turn off your amplifier before plugging and unplugging power cords, Turn down the amplifier volume before plugging and unplugging audio cables.

Now, unplug the electrical cord of all equipment that is connected directly or indirectly to your mixing board. You will leave your power amp and Mixer still connected to the A/C power, but turned off.

With the mixer on and the Master faders on the Mixer pulled down, turn on the Amplifier and bring up the Volume controls on the Amp.

Do you have the Hum?
I would assume not, but let me know.

If you do have hum, you need to install a ground-lift on your Amplifier. a ground-lift plugs onto the end of the electrical cord and converts the 3-prong plug to a 2 prong. Let me know if that doesn't clear the hum.

Btw, I have never had an issue with using ground-lifts where needed, as long as no one tries to defeat it's polarity by reversing it in the outlet. NEVER, EVER do that, people!

If you have no hum, bring up the Master faders.
Do you have the hum, now?

If you have no hum, then the electrical connection between the Board and amplifier are functioning properly.
At this point I should tell you that there can be more than one piece of equipment that can contribute to this so it's important to continue to check the rest of the equipment, but do so one at a time, and disconnect each one before testing the next.

And, there is no point in continuing if you have not cleared the hum on the previous equipment (the Mixer and the Amp).

So assuming we're making progress, lets connect the power to the DAW (computer). REMEMBER: the Amplifier is powered OFF!

Master fader out of the DAW is pulled down. Mixing board is turned on next. Faders down. Next, turn on the Amplifier.
Amplifier Volume up.
Mixing board Master fader up.
DAW Master fader up.
How are we doing so far?

If you have a hum now, Power amp off, install aground lift on the DAW electrical cord.
By now, I hope you see the pattern were using.

Once the electrical has been straightened out, we can talk about noise coming from audio cables.
I'll be happy to help you further if needed.

Let me know what's happening and feel free to ask questions.

Best wishes..
Rick
Last edited by rchaisse on Mon Sep 11, 2017 4:42 pm, edited 1 time in total.
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Re: ground noise with Cubase Pro 9

Post by lanstrad » Sat Sep 09, 2017 5:24 pm

Hummm. Just installed this version for first time, tried a project I had done in Cubase 8, and I also notice some noise on one track - drums I had taken from one of the available loops within the program which I had re-recorded as audio and silences are humming !

For all other tracks (some made with mic on guitars, some direct instruments), no issue, no noise !

Weird...
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Stephen57
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Re: ground noise with Cubase Pro 9

Post by Stephen57 » Sat Sep 09, 2017 7:32 pm

Rick, nice post, and I think you provide a good overview, however, I don't recommend lifting the ground. I recommend correctly grounding equipment and working with A/C power that is stable, in phase and, above all, grounded. I will only lift the ground on a component within a system if there's no other way to obtain that signal and that almost never comes up. Anyway, as I said before, none of what I'm saying in this post is technical advice and users should always consult licensed electricians or technicians for any issue having to do with electrical power usage, including RFI or EMI noise issues in their systems.

The article, above says that the RME card has some self-noise problems and posts over there offer possible solutions. What I was wondering about that -- is the noise recorded on tracks or just present in the monitor?
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Re: ground noise with Cubase Pro 9

Post by lhtlueders » Sun Sep 10, 2017 12:45 pm

Stephen57 wrote:
Sat Sep 09, 2017 7:32 pm
Rick, nice post, and I think you provide a good overview, however, I don't recommend lifting the ground. I recommend correctly grounding equipment and working with A/C power that is stable, in phase and, above all, grounded. I will only lift the ground on a component within a system if there's no other way to obtain that signal and that almost never comes up. Anyway, as I said before, none of what I'm saying in this post is technical advice and users should always consult licensed electricians or technicians for any issue having to do with electrical power usage, including RFI or EMI noise issues in their systems.

The article, above says that the RME card has some self-noise problems and posts over there offer possible solutions. What I was wondering about that -- is the noise recorded on tracks or just present in the monitor?
The noise is recorded on tracks. The external instruments are coming 100% noise free into the sytem. It's only the analog out signal of the soundcard which is having the noise. Is there a way routing the Stereo Out of Cubase directly to the Stereo In without going through the analog cables? Maybe through the device Port settings in Cubase? In this case I could use the external mixer for my external instruments only and route the VST sounds and audio internal. Is that possible, because both signals needs to be merged together again somewhere? Maybe that will lower the noises...
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Re: ground noise with Cubase Pro 9

Post by Larioso » Sun Sep 10, 2017 2:01 pm

I have the RME HDSP 9632 - being PCI version of AIO.
Using a Focusrite TwinTrak Pro channelstrip some years back - and spdif out for monitorng - I got this 50 Hz hum.
I used a normal audio RCA cable for that spdif - changing it to proper 75 ohm digital cable fixed it.

Other things to suspect that introduce ground loops if cables are not shielded as they should, even usb cables.
So if running synths with usb midi, like many like to do - there is something to check - just disconnect and then back, kind of thing.
As I recall reading about it - shield should only be in one end of cable, or there may be ground loops through that way through chassis of various equipment.
Ground is one thing, shield another.

One test that if some ground loop may be if touching chassis of equipment changes sound.
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Re: ground noise with Cubase Pro 9

Post by rchaisse » Sun Sep 10, 2017 2:56 pm

Hi Stephen57,
Thank you for your response.

I should let you know that I don't ground-lift unless necessary, which I find is frequently.
There is nothing wrong with doing so, if you do it properly.

If you re-read my post, you will see that if an electrical ground loop is NOT the cause, no ground-lifts will be required. I even made sure he was plugged into a single outlet to minimize that possibility.

As a professional ( licensed) field technician that covers Telecom, computers, home theater, studios, along with owning a studio and a sound re-enforcement company for many years, I can tell you I have solved many sound problems that many others have tried and failed.
I don't say this to brag, I only want to help you to understand that's it okay.

Also, what would you do if you were about to start a live stage performance and you suddenly realized there was a loud hum coming from somewhere? After trying the obvious ( bad cable, etc. ) do you tell the audience to wait while you try to decipher what is going on? Or do you go over to the amplifier that has the hum and pop a ground-lift on it? ..Problem solved.
I have never had an issue with using ground-lifts where needed, as long as no one tries to defeat it's polarity by reversing it in the outlet. NEVER, EVER do that, people!

Remember, it's not the method.. it's the results. And, as long as safety is at the top of the list I'm okay with doing what it takes.

I hope my advise helps Ihtlueders, and others.. it's so nice having a dead-quiet system.
Rick
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Re: ground noise with Cubase Pro 9

Post by peakae » Sun Sep 10, 2017 3:14 pm

Are we sure there is a ground loop problem here ?
From what I can see from the png picture, that looks perfectly normal if external synths are connected and monitored.
Image
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Re: ground noise with Cubase Pro 9

Post by rchaisse » Sun Sep 10, 2017 3:34 pm

I have a old cassette recorder that has an LED VU meter.
I connect it to the master out on the mixing board.
Then, I put it in record mode and turn the input up full.
With the faders up full, now, I get a real visual display of the noise coming from the system.
By process of elimination, I can get the LEDs to just flutter.
That's when I know I have a truly quiet system.
Cubase 9.5.30 & 10.0.5, Win7 Pro 64-bit, Intel i5, 16gb ram, Tri-Monitors, Presonus SL III with USB Interface

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