Washington Times, July 31, 1919, page 15:

Music  By  Radio  Now  Fact;  Vessels  at  Sea  "Pick  Up"  Melodies

J.  Maell.
    Music by Radio! Reports have come in of dancing to music by radio in mldocean. The fact seems as much a miracle as a literal acceptance of the above sentence might justify.
    And the facts are that radio has "picked up" music from one vessel at sea, and been used on another ship--far distant--to furnish a pastime for the passengers.
    Out at the Bureau of Standards, too, music by radio has been used for dancing. And this is the way it is handled:
    A phonograph was used for the music, placed in the basement of the radio building. Then the radio apparatus was adjusted to it in the same way it is used for transmitting a message.
    The "receiver" was set up in another building, where the dancing was held, the sound being received through what looks like the usual telephone transmitter. It was then magnified, by means of a megaphone, so that it could be heard all over the room.
    This receiving apparatus was demonstrated to the writer at the Bureau of Standards recently. And taking it from a purely unscientific viewpoint--merely as an astonishing, and to the scientists whose work finds this music but an episode, as but a casual illustration--it still furnished a fascinating promise of a later development.
How  It  Is  Done.
    The wires of the "receiver" are insulated in what looks like a crude pine window frame, such as is used in building. To this was attached a "field box" used where transportation of the apparatus is desired. Then the telephone receivers were given the writer, and there you were! The fact that space and no visible connection served to bring the sounds are now facts that are too well known to require an exposition of this most uncanny of modern inventions.
    At the Metropolitan Opera House, some time ago, the directors had a telephone adjustment in the private offices in the front of the building whereby they could--by the opening of the connection--hear what was going on, on the stage.
    But how much more wieldly seems the "wireless." And the sound, as transmitted, is said to be of the same quality as the original instrument gives out.
    Then think of having the original instrument an entire symphony orchestra, or a great brass band! These first fruits of music by wireless will surely reach a greater development, in these days of recording everything, and of enabling a small film to reflect the living action of people and events.
    When we get the speech, or the song, of these people, connected with the action, science will have achieved, yet again, a phenomenal correlation.