how can I assign a song to the fiducial mark (fiducial id 1) and another song to the other fiducial mark (fiducial id 2)?

For example... when it appears the fiducial mark id 1 start playing a song and when it appears the id 2 start playing another song and when they appear both at once begin play the two songs.

Thank you

Hi Bruno, that's quite simple. Try something like this:

Of course you will want to implement some fancier things like fading in and out, also remember that the detection isn't really perfect so sometimes a fiducial may disappear for a brief moment. All these things will need to be taken into consideration.

Cheers,
Gilberto

Hi Bruno,

Here is a better solution. Instead of literally starting to play the file every time an object appears and stop playing when it disappears (which may lead to problems if the detection is not absolutely perfect; if the fiducial is lost and found by the camera very quickly, the file will start playing over for apparently no reason) , maybe you want to have those files constantly playing and only turn the volume up when a fiducial is on the screen and turn the volume down when they are removed from the screen. See:

reactivision-example.pd

Cheers,
Gilberto