N.

 1 8 |    the order of the music and singing used for sacred worship.6
 2 9 | indicates that this custom of singing hymns was in force in the
 3 10|      that the sound of church singing was not completely silenced
 4 14|       Rome, the Roman mode of singing gradually spread to other
 5 14|      but a new kind of sacred singing, the religious song, frequently
 6 15|       9th century, polyphonic singing was added to this choral
 7 15|   study and use of polyphonic singing were developed more and
 8 19|     mixed with organ music or singing."11 In addition, not to
 9 39|    them or to perform them by singing or using musical instruments,
10 64|       a great crowd of people singing as with one voice, they
11 67|  diligently popular religious singing of this kind in the dioceses
12 71|       of idols with religious singing. It is not prudent, then,