This switcher was designed for a home recording setup that will allow choosing one of 4 signal/effect inputs to be buffered and split into two mono outputs for amp/recording inputs. It regulates the 9v power down to 5v for the USB port to power a wireless guitar signal going into input 1. 

A great solution for someone who often runs a guitar straight into their amp but does use effects at times-this switch allows you to bypass effects not being used, preserving the clarity in your signal. The A/B outputs can connect to two amps, "B" can be left empty so you mute your signal when selected, or you can use "B"as a tuner out. 

I can build any spec loop switcher you need, using foot switches, toggle switches or push buttons. Customizations like LED color, switch and jack positioning can be specified by you. 

This switcher was for a bassist using an electric bass, bass synth, and upright bass equipped with both a transducer and mic. There is an effects loop send and return with dual Mute switches before the loop. Two of the signals can be routed to the Tuner via reverse A/B wiring for silent tuning. The three outputs then went to a min mixer I built, for volume adjustments prior to the house signal. 

Our simple Mute switch customized into a Stereo latching Mute for a keyboard player- this product became a standard offering due to demand. 

This project incorporated a Volume switch with treble bleed, then buffered and split the signals to two outputs, each with their own mute switches.