He was Joint Principal of Drumming and Senior Drum Major for the Scottish Pipe Band Association, now known as the Royal Scottish Pipe Band Association or RSPBA, and the original holder of these titles at the organization's formation.
[1] After the war he published his first book, Bagpipe and Drum Tutor with Pipe-Major Willie Gray in 1922.
[2] This was one of the first known publications to use musical notation to describe a pipe band style drum setting.
In 1936 Seton was asked to form the drum department of a new pipe band college, along with Alex A.D. Hamilton.
This effort was delayed by World War II but eventually did become the Scottish Pipe Band Association College in 1947, for which Seton was the Senior Drum Major and he and Hamilton served as co-Principals of Drumming.