Radios <broadcast> both the latest popular songs and native folk melodies of Mexico

[park sang joon]

As the worst of the depression passed and the deportations and "voluntary" departures diminished, the rhythm of life in the barrio resumed, presenting a fascinating picture of a community suspended between two cultures. Radios covered with colorful serapes broadcast both the latest popular songs and native folk melodies of Mexico, called rancheros.
[Source: Reading for Results Ninth Edition by Laraine Flemming]
I'd like to know how radios can broadcast songs.
Thank you in advance for your help.

 

[Glasguensis]

To broadcast means to distribute without request or action on the part of the recipient. In the case of a radio, or indeed any music playing device such as an MP3 player with speakers, the songs are broadcast to anyone who is within hearing range.

 

[park sang joon]

Thank you, Glasguensis, for another very helpful answer from you

 

[RM1(SS)]

From the WRF dictionary:

• to cast or scatter abroad over an area, as seed in sowing.

• to spread widely; disseminate: She broadcast the good news all over town.

The idea is that the sound from the radio (or the signal from the transmitter) goes in every direction - like the light from a light bulb, rather than that from a flashlight.

 

[park sang joon]

Thank you, RM1(SS), for your so very kind and helpful answer.