Earliest known recorded Canadian radio broadcast

audio: radio100.moeb.ca; image (cropped): Dining room, Mount Royal Hotel, British Library, 1922, photographer: Rice Studio.
The MOEB would like to thank David Lennick for sharing this recording.
[Audio Transcript]
CKAC La Presse Montreal. This is the Hotel Mount Royal Concert Orchestra under the direction of Rex Battle broadcasting directly from the main dining room of the Mount Royal Hotel. This is Rex Battle speaking. I go to play a piano solo, the Rondo Capriccioso by Mendelssohn. I am playing this on the request of Misses Ella Faut from Detroit Michigan. Understand that the record, the Apex Record Company, will make a record of this over the air. And I wish them good luck. [Piano music playing].