Mass Music.

Here's some horrible reporting, as of course the Pope hasn't "demanded" anything - but still, one more reason to love Benedict XVI:

"The Pope has demanded an end to electric guitars and modern music in church and a return to traditional choirs.
The Catholic Church has been experimenting with new ways of holding Mass to try to attract more people. The recital of Mass set to guitars has grown in popularity in Italy; in Spain it has been set to flamenco music; and in the United States the Electric Prunes produced a "psychedelic" album called Mass in F Minor.
However, the use of guitars and tambourines has irritated the Pope, who loves classical music. "It is possible to modernise holy music," the Pope said, at a concert conducted by Domenico Bartolucci the director of music at the Sistine Chapel. "But it should not happen outside the traditional path of Gregorian chants or sacred polyphonic choral music..."

Here's the whole thing, such as it is.