simultaneous presentation of audio and visual stimuli
Hi there, help needed! 
I am going to run an experiment where participants will simultaneously listen to a sentence and see a picture on the screen. Because of the delay in playing audio files and the refreshing rate of computer monitors, it may be tricky to keep pictures and audio aligned. I heard the software program Presentation has very good timing and simultaneous presentation of audio and visual stimuli can be easily realised in it, but it is expensive. So I wonder whether this design can be realised in OpenSesame and how to do it? Many thanks!
Comments
Not sure if this applies to playing from audio files, but I have a task in which I present tones using the synthesizer tool. I put the audio stimulus before the image that I want to display it with and set the 'duration' of the stimulus to 0ms. This is interpreted separately from the 'length' of the audio stimulus (which in my case is 100ms) and refers to the time that the program waits before moving on to the next stimulus. I'm not absolutely certain that the audio and visual stimuli are perfectly coincident, but they appear to be from my subjective perspective, and consistently so (i.e. - no slippage).