In my experiment, I present audio along with Video stimuli (containing dynamic noise). I defined the duration of the video stimulus the same as the duration of the audio ( that I defined in an excel file). For some reason, the audio is not aligned to the video, such that for some trials, the audio stops in the middle, and the video continues to play, and for other trials, the sound ends, and the video continues to play.
When I tried to run my study multiple times, it only worked in some attempts. It is almost like the order of the stimuli affect the timings of other stimuli. For example, if sound “X” is presented first, it works fine. However, if the same sound is presented after sound “Y”, it does not work (meaning that the sound stops in the middle and ends the trial).