The paper presents a multi-modal approach to tightly close the interaction loop between a human user and any tool in operation. Every activity of a human being generates multi-modal feedback, more or less related to the eyes (visual), the skin (sensory), the nose (olfactory) and the ears (auditive). Here we show the useful augmentation or complete creation of a nonexistent or less available feedback. As an example the performance of drilling tasks, line drawing tasks, or the complex task of bowing a violin can be considered.