it enables the signals from multiple channels on a mixing console to be simultaneously routed to a single outboard device. For instance, audio signals from all the channels of a sixteen-channel mixing console can be routed to a single outboard reverb unit so that all channels are heard with reverb. The aux-sends from a group of inputs can also be routed to an amplifier and then sent to monitor speakers so that the onstage musicians can hear their singing or playing through monitor wedge speakers on the stage or through in-ear monitors. The benefit of using the pre-fader aux-send function is that the volume of the vocals or instruments in the monitor mix does not have to be the same as the "front-of-house" mix for the audience. Musicians whose voices are barely present in the "front-of-house" mix, such as backup vocalists, can have their sound clearly and loudly sent through a monitor speaker so that they can hear themselves singing and ensure that their pitch and timing is correct. See also Sound reinforcement system Sound recording Send track Audio engineering Electronic music