To the modern ear the four types hardly warrant segregation. In fact these four "formats" all only air today in the US on Public Radio and other NPR affiliates. The four types of program submitted for approval were:
- Concert artists assisted by a small orchestra
- Grand Opera
- A varied program of classical and semi-classical selections by mixed instrumental and vocal soloists
- Chamber music concert
"Not to be outdone WJZ comes across with a new series in an effort to perk up its Sunday's broadcasting. The Bakelite Hour is its most recent acquirement and last evening during this period, which starts at eight o'clock, the Philharmonic Chamber Music Society was in the spotlight. This marked the first of four Sunday evening "hours" to be presented by the Bakelite Corporation and at the end of the four, each of which will be different in nature, the radio listeners may choose the one they think most appropriate and entertaining as a steady diet."The program was still airing on Sundays through at least May of that year. It was short lived and poorly documented like many of these trail-blazing programs from the 1920s.