Are you all thinking something similar to how RDS works with broadcast signals 
or are you thinking something more robust due to the weak signal 
characteristics of FT8?  I can definitely think of some applications for 
disabled ops to allow them to augment other appliances helping them on the air. 

Jim S. 
N2ADV

> On Sep 23, 2021, at 2:18 PM, Glenn M-H via wsjt-devel 
> <wsjt-devel@lists.sourceforge.net> wrote:
> 
> Maybe a sound processing system can analyze the sound signal and place the 
> FT8 signal between the lowest human harmonic frequencies greater than 300Hz.
> 
> After a compressor/clipper a bandwidth (50-100Hz?) with some center frequency 
> automatically chosen above, should be notched out - and the FT8 signal 
> inserted here. The FT8 signal must be inserted, after the non-linear 
> compressor/clipper, so the FT8 signal is not subjected to non-linearity.
> 
> OZ1HFT
> 
> -
> 
>> Den 23. sep. 2021 kl. 19.27 skrev Philip Gladstone 
>> <pjsg-w...@nospam.gladstonefamily.net>:
>> 
>> I think that it would be an interesting experiment to transmit voice on SSB 
>> with a continuous FT8 transmission (maybe at around the 1kHz offset) and see 
>> whether there is a combination of offset & volume difference that makes the 
>> FT8 decodable if the SSB is barely understandable or better, and yet have 
>> the FT8 transmission be essentially inaudible.
>> 
>> I'd like the FT8 transmission to just send the sender's callsign and locator 
>> and not much else. This could be entirely automated by the 
>> radio/microphone/speech processor/whatever. 
>> 
>> Philip
>> 
> 
> 
> 
> 
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