Re: [BC] FM Band other used for 19 kHz.

[RRSounds@aol.com]

Dave:
Anything you do dynamically to the pilot will create sidebands. I would 
imagine that any sidebands more than a few tens of Hertz wide might contribute 
unpredictably to audio noise. That being said...

It might be an interesting way to send metadata to allow a receiver to "undo" 
longer-term aspects of audio processing. Then there's always load management. 
:-)

David


On?Wed, 18 Jan 2006 07:59:05 EST,?DHultsman5 at aol.com?wrote:
<<
Ok? Brain trust? I have several questions.? ? What? can we technically use?
10% of the FM signal at 19 kHz.? for other than? light the stereo light (not?
primary) and phase locking the 38 kHz. DSSB? suppressed carrier?

I have heard several ideas in the past, Frequency shift keying for? data?? 
By?
adding a time constant to hold the receiver phase while the 19? kHz. is?
shifted + or -.?

I have heard discussion of amplititude modulating the 19 kHz. low response ?
with no cut off below 2% modulation for telemetry tones.

Since it was such a small amount of bandwidth and % of? modulation. ? Think?
about it. ? It seems that we are wasting? 10% modulation when the receivers?
could be locked with todays? technology.? ?

I doubt that it will ever be changed but? I wonder if you could do? 
something?
similiar to RBDS on the 19 kHz?

Think out of the box.......Comments and ideas???

Dave

hanging out in Pittsburgh
>>


David P. Reaves, III
TransLanTech Sound, LLC
Creators of the Award-Winning "Ariane Stereo Audio Leveler"