Final answer:
In the recording of the Estampie, the Rebec, which shares the melody with a pipe, is a a. string instrument used in medieval music.
Step-by-step explanation:
In the recording of the Estampie, the melody that is shared by a pipe and a Rebec features the Rebec, which is a a. string instrument. The Rebec is a bowed instrument commonly used in medieval music and is an ancestor to the modern violin.
Like other string instruments, such as violins and guitars, the Rebec utilizes resonance in its sounding box to amplify and enrich the sound produced by its vibrating strings. Instruments like these play a critical role in the rich tapestry of medieval music, often accompanying or being accompanied by wind instruments to create complex layers of melody and harmony.