ok good question ! and i have the solution :P excuse my english, if u don't understand something it's surely because of my expression, but i try. 1- the first problem i have encountered is when i touch a sensor the message 0,127,0,127,0,127... was send in loop to resolve this problem i have simply connect the 0v of the midibox to the ground. 2- ok at this stade, when i touch a sensor it send correctly the values like a button. (but very quickly and intuitively) but when i touch to or more sensors, there's no more message send or messages are send randomely. to fix this problem, i simply plug myself ;D with a jack in the belt directly to my skin connected to the ground ;D Now my body was perfectly at 0v, the computer & the midibox also !! and i can touch 32 or more sensors, without any problem, like a button. i search a better way to solve this problem, but for now i plug (myself) & play ;D Now i'm on way to design my definitive midibox with two circular "camembert" of 7 & 9 parts and some linear touchsensors of 12 parts... 8) From where come this purple colour of your board ? ???