What makes Ptah, the El Daoud by Joe Henderson notable?

'Ptah, the El Daoud' is notable for its critical acclaim, often cited as one of the key albums in the spiritual jazz genre. It showcased Henderson's innovative approach to improvisation and composition, influencing future generations of musicians within both jazz and world music scenes. Upon the release of 'Ptah, the El Daoud' in 1970, Joe Henderson was emerging from his tenure with the legendary Blue Note label. This album followed his acclaimed work on 'Inner Urge' and marked a significant evolution in his sound as he incorporated more avant-garde elements and spiritual influences into his compositions.