Quiet prelude music can create an atmosphere of worship that invites the spirit of revelation and testimony into Church meetings. The organist or pianist should usually play hymns or other appropriate music for five or ten minutes before a meeting. Playing hymns helps members to review in their minds the teachings of the gospel.
Carefully selected postlude music can extend the spirit of the meeting as the members leave. Hymns or other appropriate music may be used. The mood may be joyful on occasion but will often be reverent and thoughtful.- Church Music Handbook, p. 3