[FieldTrip] Emotiv headset realtime capture

[Zeddy He]

Hi Valentin,
 
I am not entirely sure exactly what part of the process you're not sure about. I'm new to fieldtrip as well and I have never heard of emotiv until today. I have, however, been playing around with FieldTrip's realtime acquisition part for the last couple of weeks(acq2ft, AcqBuffer), and maybe able to offer some pointers in getting it set up on your system.
It seems that to use emotive2ft, you would have to compile it first, call upon it in matlab before starting your emotive software, and then start the emotiv software. I am not exactly sure what can read the bufferdata, though ft_realtime_signalviewer as well as viewer.exe may be good functions/programs to start off with. 
If you're using acq2ft or Acqbuffer already for realtime acquistion from another CTF device, you could try running one of those first either by standalone or their MATLAB equivilent functions, and then run emotiv2ft in matlab without any passed in parameters(unless you didn't decide to put the buffer on localhost:1972). You also might be able to just let the function create it's own buffer by giving it a new port, and then draw from that port seperately later on.
Some troubles I've ran into while using FieldTrip's realtime functions include:
shmget() errors on linux systems
firewall blocking port
number type in-compatibility
and perhaps a couple others I can't recall at the moment.
 
If you think I might be capable of assisting you, let me know and I'll see if I can give you additional details.
 
Regards

Zeddy

 
> From: valentin.umbach at hu-berlin.de
> Date: Tue, 31 May 2011 18:51:17 +0200
> To: fieldtrip at donders.ru.nl
> Subject: [FieldTrip] Emotiv headset realtime capture
> 
> Hi, I'm new to FieldTrip and I'm interested in using it to capture
> realtime data from the Emotiv headset using this interface:
> http://fieldtrip.fcdonders.nl/development/realtime/emotiv
> I'm not clear about how to make calls to this interface from within
> Matlab. Also, I would like to know if it's possible to access not just
> the raw EEG, but also the API output of the detection libraries
> (Affectiv Suite...).
> Any help is greatly appreciated!
> 
> Best, Valentin
> 
> -- 
> Dipl.-Psych. Valentin J. Umbach
> Institut für Psychologie
> Humboldt-Universität zu Berlin
> Rudower Chaussee 18
> 12489 Berlin
> Tel. +49 30 2093 9438
> E-Mail: valentin.umbach at hu-berlin.de
> 
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