5
Wire strings that produce sounds are in piano.
Added 4/23/2014 8:32:13 PM
This answer has been confirmed as correct and helpful.
Confirmed by
jeifunk [4/23/2014 8:38:05 PM], Unconfirmed by
jeifunk [4/23/2014 8:38:06 PM], Confirmed by
jeifunk [4/23/2014 8:38:06 PM]