Axel Berger wrote:
Not sure who "you" is in your answer. In this thread I'm exclusively
speaking about radio, i.e. the spoken word, while several others are
going on about music.

I don't know about usage in Germany, but in (IME) in
the UK, Australia, and NZ "radio" might mean any kind
of radio broadcast of audio, whether of speech, music,
weird experimental sound sculptures, etc; or combinations
thereof.

#Paul