NUTA Jazz Band held its position as one of the major Tanzanian dansi bands throughout the latter half of the 1960s and most of the 1970s. In 1977 it experienced a major change in personnel, with many of its most talented musicians (including Muhiddin Maalim Gurumo and Hassani Rehani Bitchuka) leaving the band to form a new ensemble, Mlimani Park Orchestra. In 1977, the band changed its name to "Juwata Jazz", after the Swahili name of its sponsor (NUTA), Jumuiya ya Wafanyakazi Tanzania. About at the same time, guitarist Saidi Mabera became the new leader of the band. He wrote several of Juwata's hit songs of the 1980s. After Mabera, both Maalim and Bitchuka (who rejoined the band in 1991) became leaders.
Wengine wakajiunga na Orchestra Safari Soud (OSS) na baadhi wakajiunga na Maquis du Ziare akiwemo yeye. Baada ya ujio wa vijana hao kukawa na ushidani mkali kati ya bendi ya Orchestra Safari Sound (OSS) iliyokuwa ikipiga muziki wake kwenye ukumbi wa Kimara resort na Maquis du Zaire iliyokuwa imejikita ukumbi wa White House Ubungo. Pamoja na umri wake kuwa mkubwa, Kasongo bado ana kumbukumbu akizitaja nyimbo alizotunga na kuimba akiwa Maquis du Zaire za Angelo, Mwana Malole, Nasononeka, Baharia, Siri ya Mkoko na zingine kibao. Kasongo alifunga ndoa ya kiisilamu na Bi. Habiba….. mwaka 1984, jijini Dar es Salaam na kufanikiwa kupata watoto kadhaa kati yao wawili ndiyo waliofuata nyao za Baba yao.