Many instruments today associated with <answer>popular</answer> music filled important roles in early classical music, such as bagpipes, vihuelas, hurdy-gurdies, and some woodwind instruments. On the other hand, instruments such as the acoustic guitar, once associated mainly with <answer>popular</answer> music, gained prominence in classical music in the 19th and 20th centuries.
Vihuelas and hurdy-gurdies are currently associated with what type of music?
popular