The Two Notes Le Clean Pedal is a amp simulator with a dual channel tube guitar preamp and MIDI. Le Clean is a brilliant collection of some of the best Fender (Southern California) amplifiers ever made. It has a specific emphasis on clean tones, along with gritty / slightly driven sounds of those classic amps. You are able to engage both the A and B channels, or use either to boost the tone of the other. Engaging A & B will send a MIDI command message to your pedal board or MIDI enabled FX units.