Re: Audio quality degradation over FM transmission

kristian.hermansen@xxxxxxxxx wrote:
> Ian Stirling wrote:
>> For a good signal, pretty much the only thing that you could notice is that
>> the bandwidth is a bit lower, as the FM signals bandwidth is about 15Khz,
>> compared to the CD bandwidth of about 20Khz.
>
> Will I lose the low or high frequency bands? I mean, will I get less
> bass or less treble? What is the frequency window?

Treble.
There is no real reason why you should lose bass, though it may decay under
10Hz.
>
>> FM radio is much, much higher quality than 64K, if you're in decent signal
>> area, I'd go so far as to say that a good quality signal is usually better
>> quality than 128K.
>
> Why can it not be CDDA quality? For instance, why can't a CD be
> streamed over the radio without loss in quality? The frequency of the
> music is 44.1 KHz and the FM frequency is between 88-108 Mhz -- which
> is a magnitude of 10^3 apart. I'm confused :-(

Irrelevant.
It's transmitted in a 75Khz bandwidth, about 32Khz above and below the
nominal frequency, and would have exactly the same information content
if it was centered on 88,108, or even 1Mhz.
.

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