John Philip Sousa, “The Menace of Mechanical Music,” 1906, at ExplorePAhistory.com. Pull-quote: “The host of mechanical reproducing machines, in their mad desire to supply music for all occasions, are offering to supplant the illustrator in the class room, the dance orchestra, the home and public singers and players, and so on. Evidently they believe no field too large for their incursions, no claim too extravagant. But the further they can justify those claims, the more noxious the whole system becomes.” He was arguing against the player piano, the phonograph, everything. The original was published in the (very) late Appleton’s Magazine, Vol. 8 (1906).
Speaking of the last item above, here is a stamp for WMCA at Antique Radio. The stamp was issued when the station was born in the mid-’20s, atop the Hotel McAlpin, for which its call letters stood. The stamp says “341 meters,” which is roughly 880 on the AM dial, the position now held by WCBS. When the FRC (predecessor of the FCC) assigned stations to actual channels, WMCA moved to 570, where it remains. It also shared time there with WNYC, and had an involvement with WPCH (which stood for Park Central Hotel, which only took down the long-abandoned towers on the hotel a few years ago). Today WMCA and WNYC are back together, sharing a three-tower transmitting rig in New Jersey, to which WMCA moved in 1947 from its prior location, which it yielded to make room for LaGuardia Airport expansion. Here is an amazing history of New York City radio, followed by a series of charts showing which channels different stations used at different times, and their call letter changes.