Mbube (Zulu for 'lion') is an unaccompanied male choral form developed by Zulu men in the mining hostels and religious gatherings of urban South Africa. The 1939 Gallo Records recording of 'Mbube' by Solomon Linda and The Evening Birds fixed the template: a lead tenor calling out in full chest voice, and a chorus of four to ten baritone and bass voices answering on a four-bar riff. Tempo sits at a mid-range 4/4, the harmony cycles I–IV–V–I, and the defining feature is sheer sonic weight — mbube is loud in a way that its later softer descendant isicathamiya deliberately is not.

From the early twentieth century, young Zulu men left home for wage labour in the gold mines and sugar plantations, congregating in labour hostels around Durban and Johannesburg. There they fused four-part church-hymn harmony with Zulu group-singing traditions to build a new male-choral form. In 1939, Solomon Linda (1909–1962) recorded 'Mbube' with his Evening Birds at Gallo Records — the first Black South African music to circulate globally on record. The record sold over 100,000 copies, a huge figure for its time.

Listen for the call-and-response architecture. The lead sings a five-to-seven-second phrase and the full chorus answers with a matching-length riff; that couplet repeats. Then follow the bass voices, entering half a beat behind the harmony to create the distinctive forward drive. On the 1939 original, Solomon Linda breaks into a falsetto improvisation late in the song — that single improvised line became the 'wimoweh' hook The Weavers used in 1951 and the melody the Tokens fixed in 1961. Once you hear how 'The Lion Sleeps Tonight' extracts one improvised moment from the original, the historical arc plays out inside your ears.

Start with Solomon Linda & The Evening Birds' 'Mbube' (1939) — accept the shellac hiss and let the vocal weight settle. Then Ladysmith Black Mambazo's debut 'Amabutho' (1973), captured when the boundary between mbube and isicathamiya was still soft. To hear the diaspora refraction, add The Tokens' 'The Lion Sleeps Tonight' (1961) as a study in how a single improvised falsetto phrase turned into a globally-copyrighted melody.

'Mbube' means 'lion' in Zulu; Solomon Linda reportedly said the song came from remembering lions he heard from the window of the train to Johannesburg as a boy. He died of kidney failure in 1962 leaving his family too poor to afford a headstone. 'The Lion Sleeps Tonight' meanwhile went on to sell over fifteen million copies and generated an estimated fifteen million US dollars in Disney licensing alone; only in 2006 did a settlement finally deliver royalties to Linda's descendants. The story is a landmark case in international copyright and post-colonial cultural exploitation.