The EPFL-LAI is investigating on haptic technologies to give vibrotactile feedback in digital musical interfaces. The aim is to develop an interactive surface that can render a multi-touch vibrotactile stimulus using piezoelectric actuators. The signals that will be sent to the piezoelectric system are generated using deep-learning strategies. Then, they will be simultaneously sent using a FPGA. After this stage there will be a power supply circuit to amplify the digital signals and finally send them to the piezoelectric system. When using these haptic technologies, the sensations of playing a real instrument will be recreated and the player will enjoy the digital instrument through the touch as well. This will make the experience of playing a digital instrument richer.