The Wonder Teens

The Wonder Teens are apparently characters created by Darrell McNeil.

I had thought the two characters playing drums and keyboards were Zan and Jayna but perhaps not (and thanks to Constant for making me think).

"The Wonder Twins (Zan and Jayna) are a fictional extraterrestrial twin brother and sister superhero duo who first appeared in Hanna-Barbera's American animated television series The All-New Super Friends Hour. They subsequently appeared in comics based on the animated series, and were later introduced into the main DC Comics Universe. They have since appeared in other media, including animated series such as Justice League Unlimited and Teen Titans Go!, and the live-action TV series Smallville."