This product was developed to handle the switching requirements needed for a small performance/recording setup. Where a couple of synthesizers were being used in various configurations during performance and mix-down. For example, one synth might have a particularly good sounding piano voice while another has an excellent sax. During performance it is easy to use the input device of your choice (keyboard or guitar) and easily route it to the synth that has the sound you like. During midi-to-audio mix-down, tracks can be routed to the appropriate synth and the audio for the voices you like can be obtained.