At least one piano player has tried to lure Nessie with pleasant tunes. But when the media were watching, she didn't respond.
Music is supposed to sooth the savage beast.
Either Nessie isn't savage, or no one has yet found music she finds irresistable. Then again, maybe when she's calm, she stays down at the bottom of her lake in her grotto. Sound travels much better through water than it does through air, so she could hear music anywhere in the lake.