Hi Twice,
I experienced a lot the use of the mindwave headset in max. I used it for a few installation.
I can give you some hints but first let me understand what exactly you want to do. I mean you want to get the raw data out of it or simply the coded signal from meditation and attention?
Also I used it on a windows platform so anything I am gonna tell you will be related to this os.
Let me know
This is a limited library but maybe it fits to your needs
Let me know
Cheers