Possible Clues:

• Nice to hear 50-100 breaking into song by Jedward, maybe
• Listened to Elsie, in a piece for two that's pleasant to the ear
• Soothing and sweet
• Pleasant, largely boring time in Germany
• Sweetly harmonious
• Sweet musical item keeps class back
• Harmonious, melodious
• Dozy rest said to be agreeable
• Of voice or tone, sweet-sounding
• Grown-up not at first admitting church to be soothing