Dear Diana,

I'll try to do my best to answer you because I am not an expert.

.bdf files are raw files that needed to be converted first in .edf files before being used. .edf files are smaller that .bdf files. For conversion, you will have to specify a low pass and a high pass filters. These filters will change according to what you are interested in (i.e. EEG signals, EMH signals...).

.edf files are editable by brain vision. You can define as many marks as you want.

I' m not sure because last time I used Brain vision was one year ago, but the conversion was performed by Actiview, a soflware available on biosemi website (link: http://www.biosemi.com/download_actiview.htm )

AS for myself I used Brainvision only for EMG signals and the filters were 0.16Hz for the high-pass filters and 100 Hz for the low-pass filters.

Hope it will help

Best regards

Emmanuel

Hey Daina,

greetz from Germany, hope you are doing fine. Why analyzing bdf files with Brain Analyzer in the first place? What is the advantage compared to eeglab, fieldtrip etc?

Best,

Rainer

did you try just read the file creating a workspace pointing to that file?

Thank you asking this question.

I have been using BVA 2.0.1 and have wondered how other formats work with BVA. I learn that you are from McGill University. Would it be possible to contact someone in Prof. Jean Gotman's lab, NEURO, McGill. They do most of the work with BVA and simultaneous EEG-fMRI studies. Kindly do educate us if you get an answer for this. Keenly looking forward to your reply.

Hi everyone, Thanks a lot for your comments! The analyses are working now. BDF files are compatible with version 2.1, so conversion was not necessary. I was able to get the analyses working after making several adjustments to the lowpass filter, ocular correction ICA, and new reference steps. Several of you made suggestions along these lines, which were helpful for optimizing these settings. The BVA tech desk also provided very useful feedback in the end. I can forward these tips if anyone's faced with similar problems - but PM me as I will not continue to monitor this thread. Thanks again!