Great, the FPGA board has a piezo speaker soldered. This is the next funny component to drive. The device is connected with one wire, where the FPGA has to send a pulsing signal to it. Typical this signal will be generated by a frequency generation module. The sending frequency of the implemented module can be increase and decrease by the switches on the board, by hitting this switches to a good beat the device generated a nice sound.
– Again, if you want to have a look into the VHDL code, just write me an email.