OpenViBE forum

Hi Maarten, Do you use the Emotiv Research Edition SDK_v1.0.0.5-PREMIUM ? From my experience, there is no hope with older versions of the SDK... I also remember that one should plug each headset sequentially : first plug dongle 1, then set headset 1 to ON (check the two green lights on the dongle), ...

Hi,

This is exactly what I wanted !
Thank you very much !

TPAC

Hi all, The optimization of BCI performance may sometimes require the fine tuning of many parameters. I'm thus wondering if it is possible to run Openvibe in batch mode instead of using the GUI. Indeed, it would be really interesting (and time-saving) to have the possibility to train a BCI automatic...

Hi all, Finally, it seems that getting the signals from 2 Emotiv headsets in Openvibe is possible, provided that : 1) you use the Emotiv Research Edition SDK_v1.0.0.5-PREMIUM 2) in ovasCDriverEmotivEPOC.cpp, you search for this line : if(m_bReadyToCollect) and you replace it with : if(m_bReadyToColl...

Hello all, Sorry for giving my feedback so late. After my first investigations, it appeared that 2 headsets (Research edition) can be seen by the same machine using the Control Panel and Test Bench softwares from the EMOTIV company. Actually, it is not a big discovery. This is just a confirmation of...

Hello Laurent, Yann,

Thank you for your help. I will investigate this and will give you a feedback...

Regards,

TPAC

Hi all, I'm wondering if it is possible to get the signals from 2 (or more) EMOTIV Epoc headsets in Openvibe. For instance, this would allow to create nice multi-player games based on motor-imagery or any other BCI paradigm... Emotiv people told me it was definitely possible to connect several heads...

Hello ddvlamin, Thank you for your quick response ! As you explained, the difference between the generic stream reader/writer and gdf reader/writer is the number of streams of stimulations available (limited to 1 in the case of gdf). Your idea is great and is totally working for me: 1) convert the ....

Hi all, I succeeded in training an LDA classifier for a P300 BCI application, using experimental data recorded in a .ov file. I tried to do the same job with the same data but first converted in a GDF file. In this case, my scenario is not working, and is pending forever... It seems that information...

Yes actually it happens with EEGLAB, which works (via Biosig) with GDF files version 2.11, whereas Openvibe manages GDF files version 1.25. The problem I was mentioning is that after decimation or channel selection, the gdf file header (at least seen by EEGLAB) is not modified... one can of course l...

Hi all, I experienced some trouble with the GDF file writer after having used the decimation or channel selection boxes. The file is well created, but apparently, the header is not updated with the new values of parameters like number of channels or sampling frequency. This causes trouble when readi...

Hi, Openvibe apparently manages GDF files in version V1.25. If you export EEG data from EEGLAB in a GDF file, this will be created using the gdf 2.11 version, which is not readable by Openvibe (you get the warning message indicating the presence of channels with different sampling rates). As a simpl...