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Static/ current in live situation
Riddle me this Batman.
I played live over the weekend with the following setup:
1) Acoustic electric and Mic into Centrance Mixerface R4
2) R4 connected to IPad
3) R4 headphone out (1/8” to XLR)
4) XLR to mixer/ sound system.
Everything sounded great and had good control over everything.
However, any time I touched the iPad I could hear a buzz from the system. At one point, when I touched the mic I got a huge electrical shock! What’s going on here? iPad and R4 both totally running on internal battery. The entire place was also carpeted. And very dry.
Please help me stay alive.

Comments
That sounds like it could be static charge buildup through your body from the carpet. The dry conditions could actually encourage that buildup. You might try googling "personal grounding protection" for possible solutions.
It also sounds like the venue could have some serious grounding issues in their house system.
Do you mean you went straight to an unbalanced signal (in stereo?) to a balanced input ?
I'm not an expert, but if you're ungrounded on your side + sending an unbalanced signal far away you're asking for trouble.
I'd ditch your mini jack -> xlr adapter and buy a DI
@wim thanks for the suggestion.
@Etienne yes correct. So I should use my DI Box from now on. Just can’t always be sure they’re pumping 48v for phantom power so I’ll need to use a 9v battery
This is what was used:
https://www.amazon.com/gp/aw/d/B00QMITC7G?psc=1&ref=ppx_pop_mob_b_asin_title
Ahahah your post should be pinned.
As @wim said the carpet + dry conditions probably didn't help either.
There are plenty of stereo DIs to choose from that can handle 9v batteries & 48v phantom power. (I have some cheap ones and they're ok)