Possible Clues:

• One sounds frequently left alone
• Child such as Harry Potter or Jane Eyre
• Book printer's no-no
• Almost always, by the sound of it, left alone
• Left alone on a number of occasions, by the sound of it
• One with dead parents
• Deprived child - no harp to play
• One bereft of parents
• One alone that's the sound of the frequency
• By the sound of it, one is frequently left like this