Ah, the tone-deaf prophet... cf. John Money on the origin of speech:

"The idea occurred to me that in the course of eons of evolutionary time when we humans evolved the capacity for speech, the human brain had to give up many of its biorobotic rituals. Human speech requires extraordinary versatility in a brain that is not restricted by fixed patterns. That was a moment of insight. In actual fact it woke me up one night and I had to get up and write it down. Humans before they develop true speech had like their animal cousins been able to communicate with chatterings, hoots, whistles, and so on. Grunts, screams and yells, however, do not lead to true human language with verbal dialogue, pure reasoning and numerical calculation. The origins of human speech must be sought elsewhere. Where else to look? My answer to that question was in singing. In other words, music and sound for which I like the name songmap."

"Humans are the only species with true singing, and there is a special place for it in the brain. Singing has all the cadence, melody, and rhythmic changes necessary for speech. Singing has syllabic intonation, phrasing, and even copying of sound. That is exactly what one needs to have human speech. That's why it is possible to say that human speech began with the lovesong and maybe also the lullaby of the mother with her baby."