31. Services have been high church but now include Parish Eucharist, choral ring of twelve bells, hung for change ringing . 32. St Olave's has a strong musical tradition, with a large choir and recently restored bells hung for change ringing . 33. The tower has a peal of eight bells, rung regularly by the North Worcestershire and District Change Ringing Association. 34. Their music varies from the early 16th century " Change Ringing " to the familiar samba " Brazil ". 35. Today change ringing remains most popular in England but is practiced worldwide; over four thousand peals are rung each year. 36. The tower is one of about fifty in North America hung for change ringing , with a ring of eight bells. 37. Perhaps because of its association with the British, change ringing lost some of its, ahem, a-peal in the post-Revolutionary period. 38. The set is a light weight ring for change ringing with the tenor at 317 kg which protects the tower. 39. But if Americans in general are innocent of change ringing , Bostonians should be at least as bell-savvy as the average Liverpudlian. 40. Taking their name from the chromatic notes, they are one of the largest sets of change ringing bells in the world.