USB grounding issue
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rickshapiro
- Posts: 13
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USB grounding issue
I have a NP88 and when the USB cable is connected I'm getting serious noise (whistling) out the 1/4 jacks. I've tried different USB cables and sure I'm using the same grounded power source for all my components. Is anyone else experiencing this?
Last edited by rickshapiro on 31 Jul 2012, 12:22, edited 2 times in total.
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Hanon_CTS
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Re: USB grounding issue
I have a similar issue with my Stage 76 EX. The noise stops completely when I disconnect the power supply/ battery charger of my laptop and run just on battery. It also stops when I use a powered USB hub in-between the laptop and the Nord.
I'll be monitoring this thread for a solution.
I'll be monitoring this thread for a solution.
Last edited by Hanon_CTS on 31 Jul 2012, 12:22, edited 2 times in total.
Re: USB grounding issue
I also have a similar issue. Mine is reduced by "some" usb hubs by about half the noise volume, others none. It seems to be the computer noises going along the ground loop somehow. Unplugging my laptop does nothing. Unplugging the USB removes the noise completely. I have done an insane amount of testing different things if you're interested, suffice to say nothing has fixed it.
Last edited by luisdent on 31 Jul 2012, 12:22, edited 2 times in total.
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Gustavo
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Re: USB grounding issue
I used to experience that with my USB interface, what happens is that sometimes the "grounding" is not made correctly.
The way that I tend to solve it is by either unplugging the laptop's AC power supply
OR
By just getting one of these:
The grounding is on the third prong, i've heard some people break it so that the noise stops, but that is not only dangerous it also voids warranties. The best solution is to get the three prong to two prong converter, it simply isolates that third prong. If you are on Europe where the prongs are different, I would not know what to do, but you could try and somehow isolate that third grounding prong in a non-permanent way
The way that I tend to solve it is by either unplugging the laptop's AC power supply
OR
By just getting one of these:
The grounding is on the third prong, i've heard some people break it so that the noise stops, but that is not only dangerous it also voids warranties. The best solution is to get the three prong to two prong converter, it simply isolates that third prong. If you are on Europe where the prongs are different, I would not know what to do, but you could try and somehow isolate that third grounding prong in a non-permanent way
Last edited by Gustavo on 31 Jul 2012, 12:22, edited 2 times in total.
Synths: Nord Stage 2 SW, Nord Lead 4R, Vintage Vibe 64 Active, Dave Smith Instruments Pro 2, Minimoog Voyager, Prophet 6, Korg Volcas
Stand: K&M Spider Pro and Hercules X Stands
Recording: Zoom UAC-8
Speakers: EV ELXP 112-P, Event Alp 5
Stand: K&M Spider Pro and Hercules X Stands
Recording: Zoom UAC-8
Speakers: EV ELXP 112-P, Event Alp 5