I am currently using an emotiv epoc x headset for research into SSVEP signals, and I have my stimulus program sending a marker value of 1 at the beginning of the stimulus, and a marker value of 2 at the end. However, I have noticed in my recordings that there were several marker values of 0 being sent alongside these two values, which I did not include in my script.

I can work around it just fine using the CSV files, it just makes the recordings visually a little confusing when there are markers I didn't place on playback.