The following is an extract from the full article. In the original, the list of "What electrical inventions are urgently required at present, and which are most desirable from a financial viewpoint?" included six entries: Wire Insulation, Storage Battery Casings, Heavy Current Microphone, Marble Substitute, Telephone Muffler, and Tele-Music.
The Electrical Experimenter, May, 1916, page 3:
What  to  Invent

    Tele-Music. An "industry" rivaling the moving picture business can be created when some genius perfects a means supplying telephone subscribers with all kinds of music from a brass band down to a violin concert. The requisites are that ten or 100,000 subscribers can listen in, all at the same time, without the sound weakening as more telephone lines are put in the circuit. The subscriber must be able to use his regulation instrument. No expensive attachments should be used; only, perhaps, let us say, a low priced horn, quickly attachable to the telephone receiver. The music should he heard loudly all over the room. No expensive nor complicated plant should be used at the point where the music originates. A two-wire line should connect the plant with "central."