Hemi-Sync and Annoyingpins and needles feeling

I've been doing hemi-sync for some time now (im in wave IV), and I must say I love doing it and the results are really nice.
However when I'm in Focus 10 (body asleep mind awake, it is really relaxing and has a lot of ossibilities) or higher (12 ect.) I tend to get a very annoying feeling of pins and needles, it gets me out of my concentration and it is hard to get back in after getting out.

I'd like to know:

1. Is anyone on this forum doing hemi-sync? and what are your experiences.
2. Does anyone know where the pins and needles feeling comes from?
3. Does anyone have additional tips on how to use hemi-sync more efficiently?

Thanks,
Chris

Oh, and by the way, for nayone not knowing what hemi-sync is, here is a small defenition and a link to the monroe institute:

Defenition:

Hemi-Sync is a trademark for a process developed at the Monroe Institute, used to create audio patterns containing binaural beats, which are commercialized in the form of audio CDs.

www.monroeinstitute.com...

I use Hemi Sync CD's but not the ones you mention.
They are amazing and I love them and would suggest them to anyone.
Your neurological symptoms are interesting.
I wonder how sound might propagate a nerve impulse of pain to the brain.
Thats weird.

Originally posted by ChrisDeemian
2. Does anyone know where the pins and needles feeling comes from?


Thanks,
Chris

maybe you are listening too loud?

I experience the feeling always when I'm in, or moving to focus ten, the sound is at a normal level.
To jungle lord: I use the gateway experience, didnt know there are more, which ones do you use?