[Elecraft] K3s can only transmit wsjt if the K3s codec is windows default.

Sat Jan 19 22:37:46 EST 2019

Folks, this should be my final post here 
on this but I think the information 
applies to any of us who use the K3s Codec 
with WSJT-X, maybe AFSK too, I haven't 
researched that possibility.

A brief recap to the issue at hand: The 
only way I could get WSJT-X to get the K3S 
to transmit was if I selected the K3s 
codec as default in windows. Doing so 
transmitted computer/internet generated 
sounds along with the WSJT-X signal. - 
Doing the procedure below will resolve 
this issue. Thanks to Peter, VK4JD who 
does not use WSJT-X for pointing this 
obscure setting out to me.

How difficult my signal was, and maybe 
yours unknowingly to you, has to be to 
decode..

Peter's suggestion below is perfect. I 
wanted to find out the easiest way to 
demonstrate this windows "feature". Here 
is a URL that describes how to find this 
page in windows 10. Not sure about earlier 
versions of windows, I only have 10 now.

https://tinyurl.com/y7dc57vm

Now... Something I discovered: you must 
have WSJT-X running to see the option in 
this windows page!

When I went to the page, WSJT-X was not 
showing and then I realized I was not 
running it. I use Win4K3Suite so I started 
that and then started WSJT-X. Moments 
later the WSJT-X sound ap was showing. 
Here is what it looks like in win 10:

http://doctorgary.net/ap-vol-dev-pref.jpg

When Peter's suggestion below led me to 
this windows page, the WSJT-X output and 
input were the windows default output and 
input. I selected the USB codec and that 
is what immediately stopped the K3s from 
sending out superfluous audio with my WSJT 
signal.

To be sure, both the WSJT-X and audio from 
the computer were being sent out 
simultaneously. Not windows sounds, those 
have been off from day 1. I'm talking 
about any sound from any web page or audio 
ap that may be running without you hearing 
it. In this case that caused me issues 
with WSJT-X and the K3s, it was a youtube 
video that was playing & I didn't know it.

I am posting this information to the 
WSJT-X list but since it dealt with the 
K3s, this answer also belongs here. 
Perhaps it is the same with any external 
card you use, as in the K3 with external 
digital soundcard? 

Hope you check your windows setting, you 
might be surprised.

73,

Gary
KA1J

> Peter,
> 
> Absolutely brilliant! I never have seen 
> this windows page or read about it, but it 
> absolutely did the trick. I now have an 
> alternate soundcard selected in windows 
> sound control panel and have WSJT-X 
> configured in App volume and device 
> preferences.
> 
> I have to experiment to be sure nothing 
> gets out sound-wise from the computer but 
> at first exposure, this looks to be dead 
> on.
> 
> How many others have not yet discovered 
> this!
> 
> 73!
> 
> Gary
> KA1J
> 
> 
> > G'day Gary,
> > 
> > This should work :
> > 
> >  Run WSJT-X
> > 
> >  Go to the system settings via the cog in the start menu.
> > 
> >  Click on "System (Display, sound, notifications")
> > 
> >  Click on "Sound"
> > 
> >  Scroll down to "Other sound options" and click on "App volume and
> > device preferences".
> > 
> >  Select WSJT-X from the list of displayed apps and select your USB
> > CODEC for both input and output.
> > 
> > Note that I don't use WSJT-X but that's how it's done for everything
> > else.
> > 
> > Cheers,
> > Peter VK4JD
> > 
> > 
> > 
> > -----Original Message-----
> > From: elecraft-bounces at mailman.qth.net
> > [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Gary Smith
> > Sent: Saturday, 19 January 2019 1:53 PM To: Elecraft at mailman.qth.net
> > Subject: [Elecraft] K3s can only transmit wsjt if the K3s codec is
> > windows default.
> > 
> > Folks,
> > 
> > I posted this on the WSJT-X reflector but 
> > got no replies. Perhaps someone here has 
> > the answer.
> > 
> > ---------------
> > 
> > Using Windows 10... Joy...
> > 
> > I have WSJT-X set up to use the K3s USB
> > Audio Codec, input & output. Both are
> > selected as Mono.
> > 
> > The codec is selected in the computer.
> > 
> > I have found no way to get the K3s to
> > transmit unless the K3s USB codec is set
> > to default device in the computer.
> > 
> > If I have another soundcard/option
> > selected in the computer, the K3s will
> > indeed present transmit mode as WSJT-X
> > signals it to do, but there is no RF
> > generated from the K3s. It's Lights on,
> > nobody home. WSJT works fine but also
> > transfers any computer sound to the K3s
> > during transmit.
> > 
> > If nothing is playing on the computer and
> > the codec is selected as default, I have
> > no trouble with anything WSJT-X related.
> > This is how I have had to have it working
> > for the last 10 months. However, I
> > recently discovered a youtube was playing
> > on another page and that audio was coming
> > through with my WSJT transmission. This is
> > unacceptable.
> > 
> > Bottom line seems to be, I must have the
> > K3s USB codec selected as default in the
> > windows sound control panel or I cannot
> > transmit with WSJT-X. 
> > 
> > There must be another something I'm 
> > missing but I can't seem to find it.
> > 
> > Any suggestions?
> > 
> > 73,
> > 
> > Gary
> > KA1J
> > 
> > 
> > 
> > 
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> > 
> 
> 
> 
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