Here’s an ad from the November 21 1927 edition of the Toronto Daily Star for an upcoming radio event:

I looked up the people mentioned in this ad:
- Reginald Stewart (1900-1984) went on to found the Toronto Bach Choir in 1933 and the Toronto Philharmonic Orchestra in 1934. In 1941, he moved to Baltimore to become the head of the Peabody Conservatory. He was conductor of the Baltimore Symphony Orchestra from 1942 to 1952. In 1962, he relocated to Santa Barbara, California, where he spent the rest of his life.
- Alexander Chuhaldin (1892-1951) started his music career in his native Russia before fleeing in 1924 with only his violin and the clothes that he was wearing. After a world tour lasting from 1925 to 1927, he settled in Canada, becoming a faculty member of the Toronto Conservatory of Music and conducting radio orchestras.
- Anna Lee Scott was a pseudonym created by the Maple Leaf Milling Company to use on its English-language cookbooks. The company used the name Marthe Miral on its French-language editions and published cookbooks under the Anna Lee Scott name into the 1970s. I’m not sure who was representing Anna Lee Scott on the air in the broadcast advertised above, but it might have been Katherine Caldwell Bayley.