I've modified the Ganz Graf in to change the operators in the jit.op connected to the color toggle. If I use two umenu objects listing the operators (copied from the jit.op help file) connected to a [pak * *], itself connected the jit.op, this works. Now if I replace it with 2 [live.menu], the video stops responding to audio. I've even tried to insert two message boxes between the live.menu and the [pak * *] : then the video responds to audio but there's no more colors. I did that because I noticed that the middle outlet on [umenu] is 'item evaluated as a message' and with [live.menu] it's 'item evaluated as a symbol'. Can somenone tells me what's going on ?