The album was described as a mixture of Southern rock, soul, blues, gospel and Motown Sound.
His bass playing was considered an integral part of the "Motown Sound".
Wonder's music had been undergoing a marked change from his earlier fit with the Motown Sound to a more personal style.
The Foundations are notable for being one of the few label acts to successfully imitate what became known as the Motown Sound.
Motown specialized in a type of soul music it referred to with the trademark "The Motown Sound".
In the United Kingdom, the Motown Sound became the basis of the northern soul movement.
Smokey Robinson said the Motown Sound had little to do with Detroit:
Much of the Motown Sound came from the use of overdubbed and duplicated instrumentation.
It was the album that introduced "The Motown Sound" to the masses.
Transistor radios were personal devices that allowed teenagers to listen to The Beatles and The Motown Sound.