The Befacomixer is just a 4HP narrow mixer module with four inputs for audio signals or control voltages. Each channel is equipped with its own level control. The module can be used as a double dual mixer or as a four-channel mixer. This is particularly practical when two signals are to modulate different destinations. If only one cable is connected to the master output, but not to the 1+2 output, all channels are summed at the master output. If a cable is plugged into 1+2 and 3+4, the Master outputs the mix of channels 3 and 4, while the 1+2 output provides the mix of channels 1 and 2.