When The Electric Prunes released their experimental "Release of an Oath: The Kol Nidre" in 1968, they challenged boundaries between sacred Jewish liturgy and contemporary rock music, creating a fusion that echoed earlier classical-jazz innovations while charting new spiritual territory. Through comparative musicological analysis, the recording reveals a significant departure from typical hard rock conventions, favoring softer dynamics, diverse instrumentation, and meditative qualities characteristic of folk rock. Seven English-language compositions based on Yom Kippur liturgy, including interpretations of traditional Kol Nidre melodies, Amida prayers, and confessional texts, demonstrate a sophisticated integration of sacred Jewish elements with modern musical forms. While congregational preferences for traditional liturgical forms have limited such innovations in synagogue settings, the recording stands as an artistically significant work that revives the historical practice of adapting sacred texts to contemporary musical styles. This adaptation ultimately expands the Jewish musical repertoire through home listening and broader cultural circulation, bridging ancient traditions with modern artistic expression.