[Eeglablist] Does EEGLAB work with EMOTIV systems

[Tom Campbell]

Hi Philipp,
The Emotiv spec promises 16-bit format (an effective 14-bit precision) when 12-bit precision used to be regarded as good enough, when .edf was drawn up as 16-bit. With a dynamic range of 256mv pp that leaves what I think is a quantization error of +/- (256/(2^14))*1000 =  +/-15.625 uV pp. This may nor be a big deal and could be the least of the noise. Is there other noise (amplification, artifactal loss of contact of saline electrodes) that comes from somewhere upstream of digitization? Or is some further precision lost somehow when writing to .edf in the software that may be otherwise used in RAM and is potentially recordable? 
 
Best regards,
Tom.

 
 
Date: Tue, 19 Jun 2012 10:40:48 +0200
From: leppert at eye-square.de
To: smakeig at ucsd.edu
CC: eeglablist at sccn.ucsd.edu; smakeig at gmail.com
Subject: Re: [Eeglablist] Does EEGLAB work with EMOTIV systems


  
    
  
  
    Hi Josh,

      

      we imported the Emotive RawData into EEGlab before but the
      noise-ratio was not too convincing.

      I guess you are not interested in the post import of the raw-data?

      

      best regards

      Philipp

      

      

      Am 19.06.2012 00:23, schrieb Scott Makeig:

    
    Josh - 

      

      Re the Emotive head set: So far as I know, this is the first
      multi-channel (14 chan) wireless EEG system to be introduced at a
      (relatively) low price point.

      

      A group in Denmark have told us they plan to soon release open
      source software for dealing with this headset and for linking it
      to mobile phones -  I hope they may also include or make simple a
      function to import the data into EEGLAB. 

      

      Once their software is available, likely someone at SCCN may
      integrate an Emotiv driver into our ERICA real-time interactive
      software environment, now using LSL (lab streaming layer) software
      (soon to be documented). 

      

      Another group in Germany now has a report in press in which they
      attached the electronics of the Emotiv headset directly to
      standard electrodes mounted in an electrode cap, with encouraging
      results.

      

      There are other 16-24 channel wireless headsets including dry
      (chip) electrodes coming onto the market - whether any will be
      introduced at a low price point I don't know....

      

      Scott Makeig

      

      

      

      On Fri, Jun 15, 2012 at 3:34 PM, findjoshgold at gmail.com
        <findjoshgold at gmail.com>
        wrote:

        Hello,

          

          I am looking at purchasing the EMOTIV research system and
          wondering if anyone knows if EEGLAB can be used with EMOTIV
          and do they have any resources on how to get the data across. 
          
            

          
          Many Thanks,
           
          Josh Gold
          

          _______________________________________________

          Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html

          To unsubscribe, send an empty email to eeglablist-unsubscribe at sccn.ucsd.edu

          For digest mode, send an email with the subject "set digest
          mime" to eeglablist-request at sccn.ucsd.edu

        
      
      

      
      

      -- 

      Scott Makeig, Research Scientist and Director, Swartz Center for
      Computational Neuroscience, Institute for Neural Computation;
      Prof. of Neurosciences (Adj.), University of California San Diego,
      La Jolla CA 92093-0559, http://sccn.ucsd.edu/~scott

      

      
      

      _______________________________________________
Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
To unsubscribe, send an empty email to eeglablist-unsubscribe at sccn.ucsd.edu
For digest mode, send an email with the subject "set digest mime" to eeglablist-request at sccn.ucsd.edu
    
    

    

    -- 

........................................................................

... PHILIPP LEPPERT
    Director Planning

... eye square GmbH
    Schlesische Str. 29-30 (F)
    D-10997 Berlin
    Germany

... Fon +49 30 698144-22
    Fax +49 30 698144-10

... http://www.eye-square.com
    leppert at eye-square.com

........................................................................


Geschaeftsfuehrer/Managing Partner: Michael Schiessl
Steuernummer/Tax No.: 29/506/02764
USt.Id.Nr./VAT No.: DE210454419
Registergericht/Court of Registry: Charlottenburg HRB 76686

  


_______________________________________________
Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
To unsubscribe, send an empty email to eeglablist-unsubscribe at sccn.ucsd.edu
For digest mode, send an email with the subject "set digest mime" to eeglablist-request at sccn.ucsd.edu
 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20120619/b0f618c2/attachment.html>