THE 1996 AIMS Choral Festival, to be held in New Ross on 1 May 25th, is organising a workshop on Gospel singing in Christ Church Cathedral, Dublin, at 2 p.m. next Sunday; information/booking from (051) 21766/23668 . . . Cothu, the Business Council for the Arts, launched its impressive 1996 programme of business training for the arts last Monday; courses on offer range from word processing to personal development; information from (01) 676 6966 . . . Micheal O Suilleabhain's Lumen, Missa Gadelica and Between Worlds will be performed by the Irish Chamber Orchestra, with the composer himself on piano, as well as singers Brian Kennedy, Noirin Ni Riain and saxophonist Kenneth Edge, at St Patrick's Cathedral in Dublin tonight in aid of the Royal College of Surgeons Nursing Faculty - tickets from usual outlets and credit card booking on (01) 4569569.