Although MIDI (Musical Instrument Digital Interface) was originally developed for controlling musical instruments, it can also be used for numerous other purposes. In the circuit presented here, MIDI signals are used to set a number of DC voltages. Up to 16 output voltages can be independently adjusted.Nowadays, every computer has a sound card, and the sound card always has a MIDI interface. However, in most cases the MIDI interface is not used. Most people control their musical instruments using MIDI commands (if they actually have any musical instruments…).A microprocessor forms an excellent starting point for building a circuit that responds to MIDI commands. In this case, the author has developed a circuit that allows the values of several DC voltages to be set in a simple manner. These could be used for measurement applications, for example. From 1 to 16 channels are possible, with each channel having its own D/A converter and an adjustable output voltage ranging from 0 to 5 V.