I am going to integrate Halo Sport into my regular guitar practice sessions. Has anybody tried this kind of technology with their musical workout. I saw the video by Mario Marzo, which is not produced by Halo Neuro and was impressed. After reading up on tDCS, I think this may be the way to go for a lot of guitar and challenges - muscle memory (fretting and strumming) and motor skill (playing while singing especially).
Assuming the Mario Marzo video isn't a deliberate fake, it is still worthless as a demonstration that the Halo Neuro has any effect, for one simple reason.
Marzo knew when he was wearing the Halo, and when he wasn't. Since he had already decided the Halo was worth buying, he got the result he expected to get.
Of course this is a fundamental problem with many psychological experiments on humans, since the humans know that they are being experimented on. Some people even go so far as to argue that it's logically impossible for "experimental human psychology" to ever be "scientific", for that reason.
A fairer trial would have been to use two identical-looking headsets, without Mario knowing which was real and which was a dummy until after he had compared the speed of learning the two pieces.
It seems that no peer-reviewed, properly conducted trials of the Halo device have been published. But hey, if you want to spend your money on one, go for it. It probably won't make you any worse as a guitarist - unless it irreversibly fries your brain, of course!