On display at the Victoria & Albert Museum is a rare "notation knife". Each side is engraved with the music and words for a blessing and a "thanks" for the meal.

The wide-bladed knife (photo) was used to both carve and present the food, probably meat, to the lordly diners.  The knife, possibly made in Italy, is made of steel with a handle of brass, ivory and silver.

The article includes a five-minute video and transcription discussing the knife and the music on it.  There are also four 30-second versions of the music which you can hear.