Re: News : ARM Trying to Buy AmperComputing

On 30/01/2025 20:39, Rich wrote:

Charlie Gibbs <cgibbs@kltpzyxm.invalid> wrote:

On 2025-01-30, The Natural Philosopher <tnp@invalid.invalid> wrote:
>

AM is of such crap quality it is unlistenable. 30-3kHz bandwidth

>
Isn't it 5 kHz?  I can't see wasting quality on a 2-kHz guard band.

 I don't know.  I just copied TNP's number, presuming it was
"close-enough".
 

I spent two years of my life designing a AM/FM Hifi receiver, for the German market.
It was a long time ago but I know those figures pretty much off by heart. On a good day you might get 50dB and 3.5Khz

I've heard about AM stereo.  Is that for real?  If so, how?

 It (AM stereo) was being "hyped" in electronics magazines in the late
70's to early 80's.  But it seemed the "hype" did not lead to any
change in the market in the end.
 

Damn stupid idea. You need above all other things bandwidth and signal to noise for good quality. AM has neither. FM as a signal doesn't have especially good S/N but the modulation method allows for a much wider use of RF bandwidth, and so the audio S/N is far greater than the underlying S/N of the RF signal. Given all they had to make the first FM radios were valves (tubes) they did an amazing job.
--
“Ideas are inherently conservative. They yield not to the attack of other ideas but to the massive onslaught of circumstance"
    -  John K Galbraith