What musical instrument appears on the guinness beer label

The harp :))

Explanation:

The harp device has been synonymous with GUINNESS since 1862 when it was used as a symbol on the first bottle label for GUINNESS. It was registered as a Guinness company trademark in 1876. It is because of the harp trademark that the Guinness company named its first lager 'Harp' in 1960.

i dont usually friend people but im online often : 3

pitch- the definition of pitch is as follows:

"the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone."