The TRIO+ is a simple-to-use guitar pedal that listens to the way you play and automatically generates bass and drum parts that match your song. Just plug your guitar into the TRIO+, press the Band footswitch to teach the TRIO+ your chords and rhythm, then press the Band footswitch again to start playing with your own personal band! Bass and drum levels can be adjusted for the perfect mix using the TRIO+'s Bass and Drums knobs. The TRIO+ also features a Simple Bass button lets you select between 3 bass line modes for busy or simple bass lines.