A 35-year-old Swansea man has pleaded guilty to stealing instruments and food from Pontardulais Town Band.
At Swansea Crown Court Jason Power admitted entering the band's HQ with two other men in December.
Andrew Beer, 38, and Christopher Davies, 22, both of Gorseinon, had previously pleaded guilty to burglary. They will be sentenced at a later date.
A fourth man has denied a charge of handling stolen goods and is due to stand trial in September.