[simne]

You could transfer different bands via different coils on different frequencies, but unfortunately, capacity of information channel is limited by frequency. Because of this, radio using high frequency waves as carrier (radio or light, or even some sort of invisible rays), not coil, and have hassle with some sort of modulation of waves.

This mean, you could not transfer more information than half of maximum frequency.

https://en.wikipedia.org/wiki/Shannon%E2%80%93Hartley_theore...

Very good channels with very high signal to noise ratio, could handle more bits than Shannon limit (on engineers slang "channel is ringing", such example is fiber channel).

https://en.wikipedia.org/wiki/Shannon%E2%80%93Hartley_theore...

Most modern research also consider some digital techniques of sound (information) compressing, like use LLM as (de)compressor (google llm compression algorithms).