I plan few month ago to have a portable setup for making music using only Elektron model sample and cycle.
And all using usb battery.
I discover something that I was not expecting. If I plug two Elektron Model on the same battery I have noise issue on the headphone.
No issue if I put them on two different battery.
Same happen if I use a usb wall charger.
So if at some point you have noise issue try to use one power source per device.
It seem to have an impact.
Curious how people manage those kind of setup.
And if they had the same issue trying to plug multiple device on the same usb power source.
Here is mine which work flawlessly with midi.
Stuff used :
LINDY Câble Adaptateur USB vers Prise DC 1,35/3,5mm, 1,5m