Parallel loops

Flippy

Hello guys,
I'm new to OpenSesame.
In an experiment I want to show pictures and play sounds in parallel.
An example:
1. For 2 mins, every 20 seconds a picture should appear (different pictures).
2. With the same beginning, every 7 seconds a sound should be played (every sound is different).

Each of these tasks in easy for me to implement in OpenSesame (loops with sketchpads/sampler) but the problem is how to do these two tasks in parallel.
Is there any solution with the Coroutine item? I tried it with loops but they are not available in Coroutines.

I hope you guys understand what my problem is
Thanks for the help.

eduard

Hi Flippy,

I don't know what your Python skills are, but I would solve this in inline_scripts accessing the sound and canvas functions directly. However, you can also consider trying to implement it with co-routines. They were designed to allow for parallel things to happen. I've never used them, so I can't help you much there. Sorry.

Btw. Based on your description, you don't necessarily need parallelism. The tricky bit is to initialise the sketchpad and sounds at the right moment, which requires you have to access to the presentation at any time, but not necessarily access to both at the same time. ( At least I believe so).

eduard

Eduard

Flippy

Hi eduard,
thank you for your help. I'm a total beginner in Python and OpenSesame. Can you show me how accessing the sound and canvas functions in parallel would look like in an inline_script?
Would be helpful for me

eduard

Hey,

To get started, you can check out the examples in the links that I provided. If I have some time later this week, I'll try to fix a little script for you.

Eduard

Flippy

I need some more help with my script.
The two functions picture_show and sound_play should run in parallel.
When I call both functions individually everything works fine.
The problem appears when I try to call the functions in threads. The keylog implemented in the sound_play function isn't working properly anymore. How I said, when I call just the sound_play function, all works fine.
Do you have any idea why it isn't working with multithreading?

Here is my code:

def sound_play():

    j=1

    while j<9:
        #Abspielen des Sounds
        sound = "0" + str(j) + "_Set1_einfach_3.5sec.wav"       #Erzeugen des jeweiligen Soundnamens
        src = pool[sound]       #Auslesen des Pfades der aktuellen Sound-Datei 
        my_sampler = sampler(src, volume=1)             #Erstellung des Samplers mit dem Pfad src
        #my_sampler.block = True
        my_sampler.play()       #Abspielen des Sounds
        j=j + 1
        #t1=clock.time()
        clock.sleep(3500)       #Wartezeit 3,5 Sekunden bis Keylog aktiv wird

        #Zeitfenster 4 Sekunden für Keylog
        start_time = clock.time()   #aktuelle Laufzeit in Millisekunden     

        print("start: " + str(start_time))  #Ausgabe Startzeit
        key_response = keyboard(keylist = ['a'], timeout=4000)  #Erzeugung des Keyloggers
        key_response.flush()
        key, end_time = key_response.get_key()  #Übergabe der aktivierten Taste inkl Zeit des Tastendrucks

        #end_time = end_time - 1000     #????? Zeit des Tastendrucks ist eine Sekunde zu lang
        print(key)
        print("end: " + str(end_time))      #Ausgabe der Zeit des Tastendrucks
        var.response = key      #Übergabe an globale Variable
        var.response_time = end_time - start_time   #Antwortzeit ist Differenz aus Zeit des Tastendrucks und Startzeit
        print("response: " + str(var.response_time))        #Ausgabe der Antwortzeit
        diff = 4000 - int(var.response_time)        #Differenz aus Zeitfenster von 4000ms und Antwortzeit
        print("difference: " + str(diff))           #Ausgabe der Differenz
        clock.sleep(diff)               #Warte bis nächaster Sound abgespielt wird
    return


    #Funktion für Multithreading
def thread_start():
    #thr1 = threading.Thread(target=picture_show, args=(), kwargs={})       #Erstellung und Zuweisung der Aufgabe "Bilder" für Thread 1
    thr2 = threading.Thread(target=sound_play, args=(), kwargs={})          #Erstellung und Zuweisung der Aufgabe "SOunds" für Thread 2
    #thr1.start() #Starte Thread 1
    thr2.start() #Starte Thread 2
    #thr1.join() #Hinzufügen von Thread 1 zum Mainthread
    thr2.join() #Hinzufügen von Thread 2 zum Mainthread
    return

thread_start()