Both Jack Spicer and Jerome Rothenberg were looking for the truth, not just in poetry. It was instinctual for them as intellectuals to exercise all the aspects of language. This is why they were both speakers, Spicer more publicly them Rothenberg, but both shared the love and the respect for the musical quality of poetry. Spicer believed that poetry was a form of magic, most effective when spoken out loud. It differs from prose, as a song does, in it's complexity of stress and intonation.
Poetry demands the human voice to sing it, and demands the audience to hear it.
In Rothenberg's Shaman's notebook The uncontrollable chanting under the shamans power only glorifies his pursuit of the truth in language. Words are a balance, and keep the peace within yourself, and sometimes between others. Words need to be spoken, and poetry needs to be read. Spicer's Book of Music perhaps best explains his feelings on the musical language. Or perhaps the relationship between music and language.