Incomplete EEG Recordings
Hi, I've faced an issue while recording EEG data using your system
For multiple recording sessions where I intended to collect 2 minutes of EEG data at a 250 Hz sampling rate, I’ve found that each file has only approximately 15,000 samples (about 61 seconds of data ), half of the expected duration.
Interestingly, only one subject’s recording completed the full length. I have verified that the intended duration was correctly set in my recording setup.
Thanks in advance for the help
Comments
Are you referring to an SDcard recording?
No, I did not use SD card mode. The EEG data was recorded directly to my computer
The 8 channel Cyton records to the GUI output file at 250 Hz sample rate. But the 16 channel Cyton only does 125 Hz sample rate. This is due to the radio channel bandwidth available. However if you record to the Cyton onboard SDcard, the full 256 Hz samples are available for all 16 channels.
Does that explain your situation? If not, consider emailing to customer support (contact at openbci.com), this will create a support ticket.
William