1) Melodic 2) Melodious 3) Musical 4) Richly melodious 1) Melodic 2) Songful 
musical; singing; resonant
• (a.) Melodious; musical.
Ca·no'rous adjective [ Latin canorus , from nor melody, from canere to sing.] Melodious; musical. 'Birds that are most canorous .' Sir T. Browne. « A long, lound, and canorous peal of laughter. De Quincey. » 
[adj] - richly melodious
canorous, canorously Singing, melodious, harmonious, musical; resonant, ringing.
songful adjective richly melodious