Choral Music from Philippines, Indonesia and Singapore

World Youth Choral Festival, Singapore, 12th December 2008

A brief history of Choral music in Singapore

Korean Kodaly Society and Association of Asian Musicology
Music, a Universal Language around Pacific Ocean
Cultural centre of Korea, Hanoi, Vietnam, 23rd-28th June 2008

Composing and arranging choral music using traditional musical materials

Young Choral Academy, Malaysia, 27th-29th September 2008

Choral Conducting and Choral Repertoire

Zechariah was a speaker to an audience of 80.
University of SABA, Malaysia, 2004

Asean Composers and Their Choral Works

Zechariah was a speaker to an audience of 30.
San Jose, USA, 2004

Tunings and Intonation for Choir

Zechariah was a speaker to an audience of 30.
Choral Directors' Association of Singapore, 2002