After releasing some commercially disappointing albums which dug deeply into the prog world, Gino Vannelli “(the ‘Canadian Elvis’) and his brother Joe realized that their most favorable chance for gaining wider recognition rested in their emphasizing the more accessible, jazz-influenced R&B side of their sound, even if it meant alienating young fans who preferred their progressive rock angle,” (Jazz Music Archives). “The result was the platinum-selling Brother to Brother (1978).” The album featured one of Vannelli’s signature tunes, the breakthrough global hit “I Just Wanna Stop.”
The album “faithfully adhered to the high standards of aural fidelity that made his first five albums stand out from the herd, the musicianship is impeccable, and Joe’s continued insistence on utilizing every innovation in the field of synthesizers and keyboards … hadn’t waned one iota. Fortunately they didn’t abandon their love and respect for jazz when they jettisoned most of their prog wardrobe
… ‘The River Must Flow’ has a rhythmic contemporary pop groove that’s brightly peppered with lively percussion outbursts courtesy of Manuel Badrena, and Carlos Rios turns in another aggressive, jazzy guitar ride.” The track begins in Bb minor, shifting to Bb mixolydian as the chorus hits at 0:50. At 1:33, the tail end of the chorus serves as an intro to the next verse, reverting to Bb minor. The two keys continue to alternate from there.