[TenTec] speech processing idea

Byron J. Watts bjw at byron.com
Thu Oct 26 23:02:28 EDT 2006


ahhhh :) see i knew i was missing something or else someone else would 
already be doing it.

I'm still tempted to look at the rf envelope on a scope just to see for 
myself (into a dummy load of course) because i'm a college student and i 
want to learn.

Thanks!

KC0NPF, Bj

Dr. Gerald N. Johnson wrote:
> On Thu, 2006-10-26 at 17:52 -0500, Byron J. Watts wrote:
>   
>> Ok first let me state that I've got a Tentec Omni D, so this is somewhat 
>> related to this list.  I have a VST host program on this computer that 
>> allows me to use a "hard" limiter on microphone audio in real time, it's 
>> a wonderful tool, I can get probably 20db of limiting with no distortion 
>> due to the look-ahead design.  it doesn't sound pretty, very 
>> "compressed" as you can imagine, but there's no distortion.  I also have 
>> a VST for a 5 band limiter for fm broadcast.  with some modifications it 
>> could be band-limited to 300-3khz and be adjusted for SSB.  have any of 
>> you ever used the most powerful processor you probably have in your 
>> shack, the PC, to do your compression/equalization for you and then 
>> interface the sound output into your rig?
>>
>> KC0NPF, BJ
>>
>> PS: I'm not a fan of highly compressed audio, it ONLY makes sense when 
>> you can't quite get through.
>>     
>
> Unfortunately the audio envelope isn't the RF envelope and severely
> clipped audio results in peakier RF than unprocessed audio. Gives it a
> splatter characteristic, so saith the book on SSB by Collins gurus,
> Papenfus, Bruene, and Shoeneke.
>   



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