Mbira dzavadzimu

The mbira dzavadzimu, whose name translates roughly as voice of the ancestors, is a set of metal keys of graduated length mounted on a hardwood soundboard, plucked with the thumbs and forefingers and typically played from inside a resonating gourd called a deze that amplifies and shapes its tone. Bourdillon's ethnography of the Shona peoples places the instrument at the centre of the bira, an all night ceremony held to communicate with the vadzimu, ancestral spirits, in which mbira music is understood not merely to accompany the ceremony but to actively help draw the presence of ancestral spirits, sometimes through possession of a designated medium, into the gathering.

The instrument is conventionally played in interlocking pairs, a leading part called kushaura and a following, complementary part called kutsinhira, whose combined cyclical patterns, together with the buzzing resonance produced by loose metal bottle caps or shells attached to the soundboard, create the dense, continuously layered sound characteristic of mbira music. Learning the instrument traditionally passes from an elder relative or recognised teacher to a younger player over years of practice, since correct tuning and the specific songs associated with particular ancestors and occasions are transmitted orally rather than through written notation.

The mbira dzavadzimu remains in active ceremonial use among Shona communities in Zimbabwe and neighbouring Shona speaking areas of Mozambique, and Bourdillon's study documents the bira ceremony as a genuinely living institution rather than a historical survival, continuing to structure how many Shona families address illness, misfortune or unresolved matters believed to involve ancestral concern.

From the 1960s onward the instrument also reached a substantial audience well beyond Zimbabwe through the work of musicians and scholars, notably Dumisani Maraire, who taught mbira in the United States and helped establish it as a subject of serious ethnomusicological study and popular performance internationally. This international attention has occasionally raised questions within Shona communities about the instrument's ceremonial music being performed as concert entertainment outside its ritual context, a tension common to many instruments that carry both a specific sacred function at home and a growing secular audience abroad, though the mbira's central ceremonial role within Shona spiritual life has continued alongside this wider international interest rather than being displaced by it.