- Dr. Sri Ganapathi Sachchidananda Swamiji
- 1,814 people
- Australia (Sydney)
The largest music therapy lesson involved 1,814 people and was led by His Holiness Dr. Sri Ganapathy Sachchidananda Swamiji (India), at the Sydney Opera House in Sydney, New South Wales, Australia, on 6 April 2015.
The lesson lasted for two and a half hours.