Funeral customs, such as the attendees singing along to traditional hymns, vary depending on the religious beliefs of the deceased and his or her family. For example, guests at a Lutheran or Church of Latter Day Saints funeral ceremony should expect to sing along to traditional hymns if they practice the same religion.
Hymns are commonplace and are expected at both funeral services for a deceased member of the Lutheran Church as well as for a member of the Church of Latter Day Saints. While hymns are present, attendees are not required to sing if not comfortable or do not practice the same religious traditions.
Additionally, funeral guests who are unsure of customs can consult resources like Funerals and Flowers, which outlines a variety of religious funeral traditions, including Hindu, Jewish, Muslim, Japanese and more.