mk1900

Hi, If I need to connect in the two scenarios as below: 1. One vocal mic (1/4" jack) and an electric violin (MIDI jack): I need to connect the mic to the Input > L/Mono and violin into the MIDI > IN? 2. One vocal mic (1/4" jack) and an electric violin (1/4" jack): I need to connect the mic and violin to Input > L/Mono & Input > R ? Please advise. Thanks in advance.