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i'd like to know if in the sampler item it was possible to stop the playing using only a mouseclick ?
I know i can put " mouseclick " "duration" field, but is it possible in the " stop after " field ?
Why don't you just try? If it doesn't work, you can always move to inline_script. There you can do the same (actually even more) things and are more in control of the flow of your experiment: http://osdoc.cogsci.nl/3.1/manual/python/sampler/
indeed i did it in an inline script and it works.