Humanities, it best fits. Humanity is the study of human culture, such as literature, philosophy, and history.
Actually, there is more than one, as Brazil has a mix of cultures (Indigenous, European, African) and this mixture produced many new instruments.
One example is atabaque, which can produce a variety of sounds: from higher to lower (but not very high,) and it can produce sharp and more fluid, sustaining sounds, too.
It's a percussion instrument because the sound is produced as a result of striking something (and not for example of a flow of air)
