Maping a midi keyboard key on a Max for Live Devices triggers a sound

Lucas Fuentes's icon

Hi!! I'm a new Max usser!!

So my problem is that when I map any key of my midi device to Max for Live rack, it trigers a piano note related with the one a pressed. Also the ware thing is that it hapends to all of my Ableton Max for Live Devices.

I tried to find where comes the sound but the output master of Ableton and the Max output master shows nothing.

Thanks.