human
I'm interested in learning more about the history of the guitar.
assistant
The first known instrument to be played with a plectrum was a lyre, which dates back to around 4000 BC. It is believed that the plectrum was used to pluck the strings of the lyre. In the 8th century AD, a form of lute called a vielle was developed, and this instrument had two sets of strings, one tuned to the same note as the other set. These two sets of strings were then plucked by a plectrum. This development eventually led to the modern day guitar.