a first wireless microphone with a first microphone element arranged to generate a first audio signal, wherein the first wireless microphone is arranged to generate a first output signal that comprises the first audio signal and information identifying the first wireless microphone;

a second wireless microphone with a second microphone element arranged to generate a second audio signal, wherein the second wireless microphone is arranged to generate a second output signal that comprises the second audio signal and information identifying the second wireless microphone; and

a monitoring device with a display, wherein the monitoring device is arranged to receive the first and second output signals and to use the display to generate a visualisation of at least one aspect of the first and second audio signals, and to associate each visualisation with a representation of the information identifying the corresponding first or second wireless microphone;

wherein the visualisation of at least one aspect of the first and second output signals is a visualisation of a combined signal comprising the first and second audio signals and the system is further arranged to determine one of the first and second audio signals to be a primary contributor to the combined signal, and

wherein the representation of the information identifying the corresponding first or second wireless microphone is a representation of the information identifying the wireless microphone that is an origin of the audio signal determined to currently be the primary contributor to the combined signal.