Musical instrument

A musical instrument was an instrument created or adapted to make musical sounds.

The Second Doctor carried a recorder which he often played to help him think, and occasionally used as a tool to vanquish his enemies. (TV: The Power of the Daleks; TV: The Underwater Menace)

Acting on behalf of Henry van Statten, Adam Mitchell paid 800,000 dollars for an alien device which the Ninth Doctor revealed to be a musical instrument. (TV: Dalek)

The Twelfth Doctor frequently played an electric guitar, most notably performing "Pretty Woman" for an audience in Essex in the Middle Ages. (TV: The Magician's Apprentice)