That sign is a treble clef
I want to say B. C. and D.
Oh yeah. Here we go.
Rock & Roll was a genre of music from the 40s/50s that combined an African American style of jazz, and R&B, to country music. Often, Elvis Presley is credited with bringing the genre to fame, by, basically being the Jacob Sautarius of the 50s. Every teenage girl was in LOVE with him.
"Rocket 88" by Jackie Brenston is often said to be the first Rock n Roll song.
Buddy Holly, Ray Charles, and Ike Turner are also very important figures of the early Rock n Roll era.
Bringing popularity to this style of music would eventually lead into more artsists picking it up, and leading into new genres, leading into The Beatles, to Nirvana, to Red Hot Chili Peppers, to the Washington D.C birth of "emo music", we can credit these people with creating Alt Rock, Indie, Emo, Metal, and Rock.
I believe it is Sonny Rollins, I hope that helps you.
