"I started taking a closer look, on their work on African instruments, and discovered that all African instruments were classified as idiophones. I disagreed deeply with this lumping together of instruments from the so-called developing world. But I could not attack Sachs & Hornbostel, giants in world music. So I decided to research how my culture, the Igbo culture, classifies music instruments and it was an eye opening experience. The Lord gave me everything I wrote in that book, it could not have come from me. The findings were such a bombshell that I had to change the Head of my doctoral committee, before I could go on with my dissertation."