[5] Inspired by the success of the Vineyard Sound,[NB 1] which he also founded and produced, Belisle formed a similar group on Cape Cod.
Hyannis Sound has performed the National Anthem at Fenway Park and at various Cape Cod League games.
[8] On August 1, 2020, Hyannis Sound released a recording and video of "O-o-h Child" by the Five Stairsteps featuring over 60 alumni, including members from the group's founding lineup.
Cahleb Derry, Jimmy Fitzgibbons, Cristian Ramos, Jacob Lamb, Savidu Geevaratne, Jarell Green, Jordan Rubenstein, Colin Watts, Ben Vance, Brendan Jacob Smith, Beckett Azevedo, Peter Carboni, Nolan Roche, Matt Goldstein, Will Wolz The ten-man lineup is selected annually.
[NB 2] After passing the audition, new members undergo orientation with rehearsals and are welcomed by alumni before their summer performance schedule.