Van Canto are a band that covers songs but uses only voice. They do guitars, voice, bass, and other instrumentos with voices, (they only use real drums) found a cover of the Bard´s Song, sounds awesome
Don´t know if you´ve heard it but here it is!
All the best and keep those cool lessons coming!
(By the way, what guitar did you use to record the Bard´s song? It sounds so good!)