On 2025-08-19 14:36, The Natural Philosopher wrote:
On 19/08/2025 13:24, Carlos E.R. wrote:
On 2025-08-17 11:00, The Natural Philosopher wrote:
On 17/08/2025 09:08, c186282 wrote:
"AM" is 'fair' for music ... not like you have
McIntosh amps/speakers in your car. It is, well,
"adequate".
The main prob is NOISE ...
That is because your RF bandwidth is only as wide as your audio
bandwidth,
And in Europe its SHIT for music, unless you are deaf. 4kHz is the
absolute limit
(We have 9kHz channel spacing)
Even FM in Europe is a bit restricted as IIRC they crammed channels
in at 200kHz spacing. Its not enough.
For decent stereo you need 400kHz...
What about digital radio?
I never worked on it.
Well, it is relatively new. But I believe some countries have phased out
FM and switched to DAB/DAB+, and all new cars in the EU must have a
receiver. Other countries are going very slow about it, like Spain.
There are several bandwidths to choose (bitrates).
I bought one receiver to try it out. Turns out signal is too weak at my
place. The receiver also has standard FM, so it works for me.
https://en.wikipedia.org/wiki/Digital_Audio_Broadcasting
The thing about digital audio that's run through a compression algorithm
is that the quality and bandwidth needed will depend on the material
being compressed
You can get a 100% hifi silence using no bandwidth at all.
:-D
--
Cheers, Carlos.
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