A relatively unknown Californian Soul & Gospel band, The Supreme Jubilees released only one LP, in 1979, which was recently re-issued and is a highly recommended gem.
Keyboardist Leonard Sanders wrote the wonderful song, It'll All Be Over, and I was not surprised when I read he was a big fan of Donny Hathaway, as this soulful groove clearly evokes Donny's sound.
Here is my slo-mo take of it.
