[2] Jegal was born in Masan in November 1925, during the Japanese colonial period.
Jegal started his music teacher career at Suchang Elementary School in Daegu at the age of 19 after graduation, and the Korean War broke out.
Luckily, due to his identity as a teacher, he was not forcibly conscripted.
Afterwards, Jegal worked as a music teacher at Busan Girls' Middle School and Gyeongnam Girls' High School before retiring in 1991 as a professor of music department at Pusan National University.
Due to his old age, his eyesight is so bad that he cannot see his sheet music.