The muse Euterpe (in the Temple of Muses) teaches you the song to lull Cerberus to sleep: blue green yellow blue red green.
You have to jump over him.
go to the underworld and play it on the dogs
u talk to one of the stachues
All you need to do is memorize the notes that she makes you play.
To get the ring you play a song to get it to give it to you or find a specal feature
you use the song that the muses gave you and play it on the Flute thing
The song is *blue blue green yellow yellow red blue green*
She means in order to charm Cerberus, you need to learn a song on the reed pipe, then play it for him in the Underworld. (Reed pipes available in Temple of Apollo in Grove of Temples.)
Enter the realm of Hades using the pomegranates, jump down to the river, and cross it to find Cerberus. Play the song from Euterpe with the reed pipe to lull the beast. (blue-green-yellow-blue-red-green)
you ask the goddess with the reed to help you with your quest.She will teach you a song.
You click on the colors around the reed pipe you get from Apollos temple
you use the song that the muses gave you and play it on the flute thing