Its another of those Soul Flute Instrumentals. Now is this the same group as the Soulful Strings or an independent group named after an instrumental by The Soulful Strings: so went the argument at the Blue Note Club in 1971 were these artists and their tracks were played.
I guess they were influenced by the Chess / Cadet recordings of The Soulfull Strings.
And maybe they were inspired by Herbie Mann?
S. O. U. L Sounds of Unity and Love – Wiki