[Elecraft] More on NoiseNuller Latency

[Walter Underwood]

The algorithm probably has inherent latency regardless of where it is implemented. This is one of the challenges of digital processing.

But…if implemented internal to a radio, the sidetone could bypass the processing.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Jul 29, 2026, at 10:03 AM, Gwen Patton via Elecraft <elecraft at mailman.qth.net> wrote:
> 
> Can it just turn off when sending CW? When you go back to listening, turn
> it back on? It doesn't need to be on while you're manually sending CW, you
> can't hear the noise anyway because you're transmitting.
> 
> 
> -=-=-=-=-=-=-=-=-
> 73,
> Gwen, NG3P
> 
> 
> On Wed, Jul 29, 2026 at 2:19 AM David Gilbert via Elecraft <
> elecraft at mailman.qth.net> wrote:
> 
>> 
>> A ham that has been experimenting with my NoiseNuller application
>> pointed out to me where the current latency is indeed a problem, and
>> that is when listening to the sidetone while sending CW with a key or
>> paddle.  The sidetone audio coming out of the computer is delayed enough
>> to throw off your keying at anything other than pretty slow speeds if
>> you depend upon that for feedback.  It wouldn't be a problem for keying
>> from a keyboard, but it is when manually keying.
>> 
>> I'm working to improve that.
>> 
>> In my opinion, though, it's just another reason why this kind of
>> processing really belongs inside the rig itself.
>> 
>> 73,
>> Dave   AB7E
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