Psychedelic soul, sometimes called black rock, is a music genre that emerged in the late 1960s which saw soul musicians embrace elements of psychedelic rock, including its production techniques, instrumentation, effects units (wah-wah, phaser, etc.) and drug influences.
The Temptations Psychedelic Soul era began in the fall of 1968 and is marked by the appearance of new lead singer Dennis Edwards after the departure of David Ruffin.
Origin of term. The term psychedelic is derived from the Greek words ψυχή (psyche, "soul, mind") and δηλείν (delein, "to manifest"), hence "soul-manifesting", the implication being that psychedelics can access the soul and develop unused potentials of the human mind.