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Maybe you could get a cable 'amplifier' which would boost the cable signal a little, thus, increasing the sound...

Not much an RF amplifier can do once the SNR ratio's been dropped... you raise the noise floor with the audio signal then.

As for where the audio comes from - the station, of course. For OTA and cable, it's a mono or stereo signal, for digital cable, it is sometimes a Dolby Digital signal (for us here it's a 2-channel signal... your provider may differ)... and satellite, could be just about anything.

As for audio quality... again, talking mostly about cable here... still what most people here have (though I understand OTA and Satellite are much bigger in the states) for quite a while, everyone was bashing tape at Master Control, VTR operators loading and unloading 2" quad hi-band, then Type-C, then U-matic, then BetaSP/SX... now a lot of stations are going to video servers. And when Phineas J. Beancounter finds out they can store 100hrs of programming at great quality or 1000hrs at "at least it's not VHS" quality... guess what data rates the servers get set for.

Bren R.