Re: [Discuss-gnuradio] Broadcast FM is crap!

[Marcus D. Leech]

On 02/19/2012 01:08 PM, Andrew Davis wrote:
> I find quite the opposite, 60's bands will sometimes have the most
> stereo separation. When stereo recording came out they made the most
> of it, they would put whole instruments on just one channel, it would
> make you feel like you are in the middle of the band. Then the 70's
> "wall-of-sound" came out and it started to be had to pull generated
> instruments to one side without ruining the effect. Now its all just
> mono again.
>
> In this digital age its kinda strange we still use analog modulation.
> If it were digital, and there was not L-R information it would just
> encode the one signal better, not wasting information and bandwidth
> like FM.
So, on a related topic, how do commercial FM-MPX receivers maintain 
proper balance between
  L-R and L+R -- do they just have a gain control that they tweak at 
the factory and glue in place?

If the gain balance is off, separation starts to go to heck really 
quickly.  And obviously, you can't use
  AGC, since that would cause a lot of noise to be injected when the 
L-R channel was mostly zero.


--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org