USB power introducing noise

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Bjørn Felle
Posts: 169
Joined: 15 Sep 2019

Post 13 Mar 2020

Hi everyone. I’ve got a live rig set up with the following:
  • iPad running NanoStudio
  • Boss VE-500 vocal effect
  • Roland VT-4 vocal effect
  • Akai mini controller keyboard
  • Behringer 302 mixer
  • Wireless in ear monitor transmitter
This all works great but there are a lot of power cables. Several of the devices are powered by USB, and currently each have an individual USB power adapter. I would like to condense this down to a USB multi adapter, but both the ones I have tried introduce a lot of audible noise. Even with its own separate power supply, the VT-4 has some hiss compared to running it off batteries. Is there anything I can do to remove this noise, either on the VT-4 alone, or preferably on the whole setup when using a USB multi adapter?

Thanks in advance
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Re8et
Posts: 822
Joined: 14 Nov 2016

Post 13 Mar 2020

Hack the battery compartment with a clean transformer. Roland...

Bjørn Felle
Posts: 169
Joined: 15 Sep 2019

Post 13 Mar 2020

Re8et wrote:
13 Mar 2020
Hack the battery compartment with a clean transformer. Roland...
Hmm, not a bad idea. It takes 4 AA batteries so 6 volts but I assume since it can take power from USB it would function on 5 volts. It would be trivial to wire up +ve and -ve from a power supply to it. To be honest I’m pretty disappointed in Roland these days.

I’d still love to be able to power them all off a multi USB charger instead of their own mains adapters if possible, so if anyone has any ideas about that I’d be really grateful :)
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Bjørn Felle
Posts: 169
Joined: 15 Sep 2019

Post 13 Mar 2020

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Jackjackdaw
Posts: 619
Joined: 12 Jan 2019

Post 13 Mar 2020

There are Y shaped usb ground hum adaptors. I'm not sure what to do with it because I never needed it but I got one with my Arturia gear.

Bjørn Felle
Posts: 169
Joined: 15 Sep 2019

Post 13 Mar 2020

Jackjackdaw wrote:
13 Mar 2020
There are Y shaped usb ground hum adaptors. I'm not sure what to do with it because I never needed it but I got one with my Arturia gear.
Thanks man, is there anything on there to identify what it is? I’m trying to search for it but google just wants to show me different things to what I’m searching for :problem:
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Jackjackdaw
Posts: 619
Joined: 12 Jan 2019

Post 13 Mar 2020

https://www.arturia.com/store/accessori ... ntcablekit

They only sell it in a kit it seems. But maybe you can find one else where.

Bjørn Felle
Posts: 169
Joined: 15 Sep 2019

Post 13 Mar 2020

Jackjackdaw wrote:
13 Mar 2020
https://www.arturia.com/store/accessori ... ntcablekit

They only sell it in a kit it seems. But maybe you can find one else where.
thanks bud, that gives me something to work with :thumbs_up:
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