sentences:  In 1967, Johnson joined the WGBH Educational Foundation and was assigned the unique, triple-role of announcer, producer and audio engineer.In 1969, Johnson became the first classical announcer on WGBH Radio to host and engineer Morning Pro Musica and continued in this role until 1971 when he passed the position on to Robert J. Lurtsema.For nearly 12 years, Johnson served as audio balance engineer and music editor for WGBH Radio and TV, supervising sound recordings radio and TV drama plus recordings of live broadcasts by the Boston Symphony and Boston Pops Orchestras.