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Re: High Pitched Whining Noise from USB

Postby sgcustom02 » 20 Oct 2016, 22:20

I tried a bunch of things last night based on the above ...

Since I have a USB 10-Port Hub, I have 1 USB Port free on the Mac; tried plugging the USB cable from the Nord direct to the Mac and BINGO :thumbup: Noise gone!!

Thanks to everyone for your helpful suggestions.

Don

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Re: High Pitched Whining Noise from USB


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Re: High Pitched Whining Noise from USB

Postby Lee Batchelor » 23 Oct 2016, 17:20

Good stuff, SG....those hubs are so handy, but I have noted that several device manuals recommend NOT using them...probably for that reason. I'm (we're) glad you found the problem. Resolutions to these sort of things benefits us all :)!
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Re: High Pitched Whining Noise from USB

Postby davisharwell » 04 Oct 2018, 23:12

Hi friends,

Stumbled upon this forum because I was experiencing a high-pitch whine through my Nord Stage 2 EX when recording in my home studio (stereo quarter inches from back of Nord, into Apogee Quartet, into USB hub, into MacBook Pro). I also run MIDI via USB cable from the Nord (through same USB hub, into MacBook pro). All things needing power are in a Furman power conditioner.

I don't think I'll shed any more light on this issue, but would like to present some information that I learned today via my troubleshooting (hopefully this will help someone, or those who are much smarter than I can help diagnose, etc).

First, I ran the interface directly into the laptop (bypassing USB hub). The high-pitch whine continued.

Second, I unplugged the USB hub from the laptop. Sound disappeared. Plug the USB hub back in, the whine came back.

Next, I unplugged the USB cable from the back of the Nord (USB Hub still connected to laptop). Sound magically went away, clean signal just like I've always had. So I swapped out the USB cable. From the Nord to the USB hub with a new USB cable. The whine came back.

Then I plugged new USB cable directly from Nord into laptop (bypassing hub). The whine didn't reappear, but there was a noticeable change in "noise" in the lines. Back to a clean signal once USB cable was unplugged.

Next, I grabbed my M-Audio Uno (MIDI to USB cable). I plugged MIDI In and Out from the Nord, and then ran the USB cable through the USB hub. High-pitched whine was back.

I bypassed the USB hub again, plugged USB directly into laptop and the whine reappeared.

INTERESTINGLY, when I unplugged the MIDI IN cable in the back of the Nord, the whine disappeared and clean signal returned (with the MIDI Out cable still plugged in). I plugged them both in a few times and can confirm that it was the MIDI In cable that caused the whine to appear and disappear.

So. I have no freaking clue what any of that means. But, it seems like in my case:

- Apogee Quartet isn't the issue as I'm now getting perfectly clean audio from the Nord (and other mics, etc)
- USB Hub isn't the issue since the whine occurred at times even when the hub was bypassed
- The Nord USB port and MIDI In plugs are the culprit; as now that I am only running MIDI Out, plus the stereo 1/4" cables I have clean signal.

Draw your own conclusions here, and I don't have the time right now to dig in any deeper...but hopefully this will help someone.

Cheers!
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